Article

A guide to considerations when implementing speculation rules, particularly for more complex sites.

Blog

Learn about the new capabilities for declarative behavior on buttons.

Blog

scheduler.yield() is a new API for ergonomically splitting up long tasks and getting prioritized continuation of execution.

Blog

The Chrome team responds to concerns from the community.

Case study

Discover how eBay improved login success by 10% using Digital Asset Links for seamless credential sharing. Learn to implement secure, cross-platform authentication and enhance user experience.

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Helping you build, grow and innovate on the web.

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Samples for Chrome Extensions are available on GitHub.

Article

Article

Warning: Starting in version 57, Chrome will no longer allow external web content (including embedded frames and scripts) inside sandboxed pages. Please use a webview instead. Defines an collection of app or extension pages that are to be served in a

Article

How to programmatically create, update, and publish items in the Chrome Web Store.

Article

Though Chrome Apps use the web platform, some web features have been disabled or else are used in a different way. Mainly this is to avoid security issues and to improve programming practices. Below is a summary of the disabled features of the web

Article

In connection with the Google Chrome Web Store, Google may make certain Chrome Web Store applications available in Google's Play for Education site. If You or Your organization is interested in participating, please verify that the

Article

One to four dot-separated integers identifying the version of this extension. A couple of rules apply to the integers: they must be between 0 and 65535, inclusive, and non-zero integers can't start with 0. For example, 99999 and 032 are both invalid.

Article

One or more mappings from MIME types to the Native Client module that handles each type. For example, the bold code in the following snippet registers a Native Client module as the content handler for the OpenOffice spreadsheet MIME type. The value

Article

Unlike the local and sync storage areas, the managed storage area requires its structure to be declared as JSON Schema and is strictly validated by Chrome. This schema must be stored in a file indicated by the "managed_schema" property of the

Article

This reference describes the methods and resource representation available for the Chrome Web Store Publish API. Each resource type has one or more data representations and one or more methods. See Using the Chrome Web Store Publish API for a guide

Article

The version of Chrome that your extension, app, or theme requires, if any. The format for this string is the same as for the version field.

Article

This value can be used to control the unique ID of an extension, app, or theme when it is loaded during development. To get a suitable key value, first install your extension from a.crx file (you may need to upload your extension or package it

Article

A plain text string (no HTML or other formatting; no more than 132 characters) that describes the extension. The description should be suitable for both the browser's extension management UI and the Chrome Web Store. You can specify locale-specific

Article

Whether the app or extension is expected to work offline. When Chrome detects that it is offline, apps with this field set to true will be highlighted on the New Tab page. As of Chrome 35, apps are assumed to be offline enabled and the default value

Article

RouteHandlerCallbackOptions StreamSource | Promise< StreamSource > Response ReadableStream BodyInit Takes multiple source Promises, each of which could resolve to a Response, a ReadableStream, or a BodyInit. Returns an object exposing a

Article

Every app has a JSON -formatted manifest file, named manifest.json, that provides important information. The following code shows the supported manifest fields for Apps, with links to the page that discusses each field.

Article

The externally_connectable manifest property declares which extensions, apps, and web pages can connect to your app via runtime.connect and runtime.sendMessage. For a tutorial on message passing see cross-extension and app messaging and sending

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Extension policies

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Technologies required by the app or extension. Hosting sites such as the Chrome Web Store may use this list to dissuade users from installing apps or extensions that will not work on their computer. Supported requirements currently include "3D" and

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TODO

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Specifies the subdirectory of _locales that contains the default strings for this extension. This field is required in extensions that have a _locales directory; it must be absent in extensions that have no _locales directory. For details, see

Article

One integer specifying the version of the manifest file format your package requires. As of Chrome 18, developers should specify 2 (without quotes) to use the format as described by this document: Consider manifest version 1 deprecated as of Chrome

Article

The name and short_name manifest properties are short, plain text strings that identify the app. You can specify locale-specific strings for both fields; see Internationalization for details. The name (maximum of 45 characters) is the primary

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One or more icons that represent the extension, app, or theme. You should always provide a 128x128 icon; it's used during installation and by the Chrome Web Store. Extensions should also provide a 48x48 icon, which is used in the extensions

Article

An overview of Custom Tab features and their browser availability.

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Discover what's coming to Chrome with the latest beta.

Index

Chrome Web Store An online marketplace where users can browse for extensions and themes. Publish your extension there and make it accessible to the world. dashboard Developer Dashboard Publish your extension and manage your store items. local_mall

Article

ChromeDriver is a standalone server that implements the W3C WebDriver standard.

Blog

Chrome 134 is rolling out now! It includes light-dismiss functionality for dialogs, and plenty more to discover.

Release notes

Customizable select, dialog light dismiss, and more.

Blog

Discover how Document Picture-in-Picture enhanced an online learning experience.

Product

Learn how to develop Chrome extensions.

Blog

You can now stop the review process for an item that's pending review.

Article

How to cancel a review in the Chrome Web Store.

Index

AI on Chrome Welcome to the next era of the web with AI. See how AI can make it easier for developers to build powerful experiences on the web. Reimagine what's possible with Gemini Nano in Chrome. Built-in AI We're bringing Gemini Nano, the most

Article

Use the chrome.contentSettings API to change settings that control whether websites can use features such as cookies, JavaScript, and plugins. More generally speaking, content settings allow you to customize Chrome's behavior on a per-site basis

Article

Use the chrome.contentSettings API to change settings that control whether websites can use features such as cookies, JavaScript, and plugins. More generally speaking, content settings allow you to customize Chrome's behavior on a per-site basis

Article

This permission triggers a warning. Use the chrome.bookmarks API to create, organize, and otherwise manipulate bookmarks. Also see Override Pages, which you can use to create a custom Bookmark Manager page. You must declare the "bookmarks" permission

Article

Use the chrome.bookmarks API to create, organize, and otherwise manipulate bookmarks. Also see Override Pages, which you can use to create a custom Bookmark Manager page. You must declare the "bookmarks" permission in the extension manifest to use

Article

There's a special Chrome-internal page to see details on prompts to Gemini Nano. This guide explains how make use of it for debugging.

Blog

Chrome on Android is going edge-to-edge from Chrome 135.

Article

Build edge-to-edge web experiences

Article

Use the 'Privacy and security' panel to inspect and control third-party cookies and check HTTPS protection.

Blog

Advance network analysis with Chrome DevTools.

Blog

Discover the new mode for popover that simplifies tooltips and other floating elements.

Blog

Improve machine-learning workloads with subgroups, shader compilation time improvements on D3D12, remove float filterable texture types support as blendable, and more.

Case study

Learn how scroll-driven and scroll-triggered animations enhance storytelling articles

Index

Learn about Chrome's privacy and security features.

Article

Use the chrome.app.runtime API to manage the app lifecycle. The app runtime manages app installation, controls the event page, and can shut down the app at anytime. any optional Optional developer specified data that the app to be embedded can use

Article

Use the userScripts API to execute user scripts in the User Scripts context. To use the User Scripts API, chrome.userScripts, add the "userScripts" permission to your manifest.json and "host_permissions" for sites you want to run scripts on. A user

Article

Use the chrome.printing API to send print jobs to printers installed on Chromebook. All chrome.printing methods and events require you to declare the "printing" permission in the extension manifest. For example: The examples below demonstrate using

Article

Use the chrome.sessions API to query and restore tabs and windows from a browsing session. string The name of the foreign device. Session [] A list of open window sessions for the foreign device, sorted from most recently to least recently modified

Article

Use the chrome.printing API to send print jobs to printers installed on Chromebook. All chrome.printing methods and events require you to declare the "printing" permission in the extension manifest. For example: The examples below demonstrate using

Article

Use the chrome.sessions API to query and restore tabs and windows from a browsing session. string The name of the foreign device. Session [] A list of open window sessions for the foreign device, sorted from most recently to least recently modified

Index

Learn how to develop extensions with AI

Index

Discover Chrome Chrome 134, Beta Chrome 133 Chrome 132 Chrome 131 Chrome 130 Chrome 129 Chrome 128 Chrome 127 Chrome 126 Chrome 125 Chrome 124 Chrome 123 Chrome 122 Chrome 121 Chrome 120 Chrome 119 New in Chrome DevTools DevTools Tips Engineering

Blog

Privacy and security panel, calibrated CPU throttling, first- and third-party highlighting in Performance, new insights, and more.

Article

Use the chrome.i18n infrastructure to implement internationalization across your whole app or extension. If an extension has a /_locales directory, the manifest must define "default_locale". You need to put all of its user-visible strings into a file

Blog

The Edge team added support for respecting the Windows ClearType Tuner values in Chromium directly, resulting in better text rendering in Chromium-based browsers on Windows.

Case study

Learn about how Google Search used the Speculation Rules API to anonymously prefetch search results to improve user experience

Article

Use the chrome.storage API to store, retrieve, and track changes to user data. The Storage API provides an extension-specific way to persist user data and state. It's similar to the web platform's storage APIs ( IndexedDB, and Storage ), but was

Article

Use the chrome.storage API to store, retrieve, and track changes to user data. To use the storage API, declare the "storage" permission in the extension manifest. For example: The Storage API provides an extension-specific way to persist user data

Article

In this guide, learn how to use BigQuery to write queries against the CrUX dataset to extract insightful results about the state of user experiences on the web.

Article

Technical documentation on CrUX tools.

Article

Receive support for the Chrome User Experience Report (CrUX).

Article

Details on the latest changes to the CrUX dataset.

Blog

Learn about the change to the Chrome User Experience Report (CrUX changes) in the February 2025 release including LCP image subparts, LCP resource types, and RTT.

Article

Learn how to construct requests to and parse responses from the CrUX API.

Article

Learn how the CrUX dataset on BigQuery is structured.

Article

Learn how to query the previous six months of historical CrUX trends using the CrUX History API.

Article

Technical documentation on CrUX dimensions.

Article

Technical documentation on CrUX metrics.

Product

Code samples, guides, and API reference you need for whatever you're building.

Article

This page documents how to start using ChromeDriver for testing your website on desktop (Windows/Mac/Linux). You can also read Getting Started with Android or Getting Started with ChromeOS. ChromeDriver is a separate executable that Selenium

Blog

Chrome allows web apps playing media to automatically enter picture-in-picture.

Blog

Discover the latest features coming to Chrome.

Article

Use the chrome.enterprise.platformKeys API to generate keys and install certificates for these keys. The certificates will be managed by the platform and can be used for TLS authentication, network access or by other extension through

Article

Use the chrome.enterprise.platformKeys API to generate keys and install certificates for these keys. The certificates will be managed by the platform and can be used for TLS authentication, network access or by other extension through

Release notes

CSS advanced attr(), text-box-trim, scroll-state container queries, and more.

Blog

Chrome 133 is rolling out now! There's some exciting new CSS features and plenty more to discover.

Article

Tabbed application mode allows Progressive Web App developers to add a tabbed document interface to their standalone PWAs.

Article

How to use specialized Auth Tab in your Android app

Article

How to use Ephemeral Custom Tabs in your Android app

Article

How to use App Specific History in your Android app

Blog

Introducing app specific history for Chrome Custom Tabs for Android

Blog

Improve web-based authentication with Auth Tab for Android

Article

Use the chrome.permissions API to request declared optional permissions at run time rather than install time, so users understand why the permissions are needed and grant only those that are necessary. Permission warnings exist to describe the

Article

Use the chrome.runtime API to retrieve the service worker, return details about the manifest, and listen for and respond to events in the extension lifecycle. You can also use this API to convert the relative path of URLs to fully-qualified URLs. The

Article

Use the chrome.permissions API to request declared optional permissions at run time rather than install time, so users understand why the permissions are needed and grant only those that are necessary. Permission warnings exist to describe the

Blog

Persistent AI chat history, better navigation, ignore listing, and stack traces in Performance, new 'What's new' panel, and more.

Blog

Additional unorm8x4-bgra and 1-component vertex formats, allow unknown limits to be requested with undefined value, WGSL alignment rules changes, WGSL performance gains with discard, and much more.

Blog

An overview of the recent changes in Chrome Extensions, plus exciting upcoming extensions features developers can look forward to.

Article

This guide introduces best practices for session management with the Prompt API.

Index

What's New in Chrome Discover the latest updates in Chrome from our documentation and blog. New content and significant updates to documentation. article How LLMs stream responses New documentation to learn how streaming data works in AI, for the

Blog

We're announcing a series of policy updates designed to provide clarity and consistency across our platform.

Blog

Discover how to detect WebAuthn capabilities with `getClientCapabilities()` and tailor authentication workflows for your users.

Article

Understand what streaming is and how it works with AI and LLMs.

Article

Use these frontend best practices to display streamed responses from Gemini with APIs that support streaming, such as the Prompt API.

Article

The built-in Translator API lets you translate arbitrary content from a source to a target language. Participate in the origin trial to take the API for a spin.

Blog

From Chrome 133, eligible CPU-intensive background tabs will be frozen when Energy Saver mode is active.

Index

DevTools Tips

Index

Improve the way you include images, video, and more on your websites and web apps.

Blog

Chrome on iOS 17 or later can now create, sync and authenticate with passkeys in Google Password Manager (GPM). This makes passkeys on GPM available everywhere Chrome is.

Blog

Like container queries; but for stuck, snapped, and overflowing queries.

Blog

You can now use attr() with any CSS property–including custom properties–and it can parse values into data types other than strings.

Blog

Learn about the latest features shipping in Chrome.

Blog

Learn about fun and exciting use-cases of the new AI assistance panel in DevTools

Blog

Chrome 132 is rolling out now! The Dialog element gets a ToggleEvent, support for element level video sharing, and the File System Access API supports Android and WebViews.

Blog

Take back space from above and below your text content; achieve optical balance.

Release notes

ToggleEvent for dialog, support for element level video sharing, and the File System Access API supports Android and WebViews, and more.

Article

Use the chrome.tabs API to interact with the browser's tab system. You can use this API to create, modify, and rearrange tabs in the browser. The Tabs API not only offers features for manipulating and managing tabs, but can also detect the language

Article

Use the chrome.tabs API to interact with the browser's tab system. You can use this API to create, modify, and rearrange tabs in the browser. The Tabs API not only offers features for manipulating and managing tabs, but can also detect the language

Index

Learn how Chrome works, participate in origin trials, and build with Chrome everywhere.

Index

See what's included in Chrome's latest stable and beta releases.

Blog

Discover the winning apps and extensions from the Built-in AI Challenge, where we invited you to reimagine what's possible with Gemini Nano in Chrome.

Article

The Element Capture API is a performant and robust way for transforming a capture of the current tab into a capture of a DOM subtree.

Blog

The merger of the Web Vitals extension and DevTools is complete and support for the extension has ended.

Article

Use the chrome.ttsEngine API to implement a text-to-speech(TTS) engine using an extension. If your extension registers using this API, it will receive events containing an utterance to be spoken and other parameters when any extension or Chrome App

Article

Use the appview tag to embed other Chrome Apps within your Chrome App. (see Usage ). object Optional developer specified data that the app to be embedded can use when making an embedding decision. string The ID of the app that sent the embedding

Article

Use the chrome.ttsEngine API to implement a text-to-speech(TTS) engine using an extension. If your extension registers using this API, it will receive events containing an utterance to be spoken and other parameters when any extension or Chrome App

Article

Use the chrome.cookies API to query and modify cookies, and to be notified when they change. To use the cookies API, declare the "cookies" permission in your manifest along with host permissions for any hosts whose cookies you want to access. For

Article

Use the chrome.cookies API to query and modify cookies, and to be notified when they change. To use the cookies API, you must declare the "cookies" permission in your manifest, along with host permissions for any hosts whose cookies you want to

Article

Learn more about mitigating clickjacking attacks.

Blog

Texture view usage, 32-bit float textures blending, GPUDevice adapterInfo attribute, configuring canvas context with invalid format throw JavaScript error, filtering sampler restrictions on textures, extended subgroups experimentation, improving developer experience, experimental support for 16-bit normalized texture formats, and more.

Index

Find out how to use Chrome's capabilities to build rich and engaging web experiences.

Article

Recent changes to the Chrome extensions platform, documentation, and policy

Article

All ChromeOS test images have ChromeDriver binary installed in /usr/local/chromedriver/. The binary is updated to the same version of Chrome in that test image. That is, you always are using the latest build of ChromeDriver. If your test expects to

Article

The WebView component is based on the Chromium open source project.

Article

Chrome allows users to emulate Chrome on a mobile device from the desktop version of Chrome, by enabling the device mode with Chrome DevTools. This feature speeds up web development, allows developers to quickly test how a website renders in a mobile

Article

For earlier versions of Chrome, here are the versions of ChromeDriver that support it. For more information on selecting the right version of ChromeDriver, see the Version Selection page. Supports Chrome version 114 For more details, see the release

Article

At this time, ChromeDriver only supports systems that have a US keyboard configured. When ChromeDriver detects this state, it logs the following: Users without a US keyboard may experience lost keys during sendKeys or TypeElement commands. As a

Article

To diagnose and fix ChromeDriver crashes, you have a few options. This is only for ChromeDriver crashes, which is not the same as Chrome crashing or closing. On Windows, you may see something like this: Create a repro case that ChromeDriver

Article

The latest binaries for ChromeDriver are packaged as zip files for various host platforms. Earlier versions of ChromeDriver can be found in Downloads. ChromeDriver supports running tests on Chrome browser (version 30+) and WebView-based apps starting

Article

Some WebDriver commands, such as resizing the browser window, require a Chrome extension to be loaded into the browser. ChromeDriver normally loads this "automation extension" every time it launches a new Chrome session. However ChromeDriver can be

Article

ChromeDriver is a powerful tool, and it can cause harm when in the wrong hands. While using ChromeDriver, follow these suggestions:

Article

This often happens when running ChromeDriver or Chrome using a special test harness (perhaps an IDE) or continuous build system (such as Jenkins). Try launching the same Chrome binary that your test uses from a normal user command prompt. Confirm

Article

WebDriver BiDi Backend Design [Microsoft] Async Command Processing for WebDriver in Chromium Browser Tools- and Testing WG, Day 2, TPAC 2019, Fukuoka Browser Tools- and Testing WG, Day 1, TPAC 2019, Fukuoka

Article

To enable verbose logging, pass --verbose to the ChromeDriver server. You can also pass --log-path to cause the log to be written to a file instead of stderr. If you don't start the ChromeDriver server directly yourself, you need to pass the switch

Article

Capabilities are options that you can use to customize and configure a ChromeDriver session.

Article

ChromeDriver supports performance logging, from which you can get events of domains "Timeline", "Network", and "Page", as well as trace data for specified trace categories. Performance logging is NOT enabled by default. So when creating a new

Article

ChromeDriver Canary has the latest new ChromeDriver features. New binaries are built and made available multiple times a day. Be aware, it's designed for developers and early adopters and can sometimes break down completely. Starting with M115 the

Article

Use the chrome.pageCapture API to save a tab as MHTML. MHTML is a standard format supported by most browsers. It encapsulates in a single file a page and all its resources (CSS files, images..). Note that for security reasons a MHTML file can only be

Article

Use the chrome.pageCapture API to save a tab as MHTML. MHTML is a standard format supported by most browsers. It encapsulates in a single file a page and all its resources (CSS files, images..). Note that for security reasons a MHTML file can only be

Blog

A Chrome study shows that autofill users fill forms faster, with lower abandonment rates.

Index

Deprecated technology to create experiences that had more access to the underlying operating system.

Index

Learn how to use latest Payment APIs in Chrome

Index

Find resources on topics such as typography, color, and layout.

Index

Automate web performance audits with Lighthouse

Index

A Node.js library providing a high-level API to control headless Chrome or Chromium

Index

Learn WebGPU with guides, demos and latest news

Index

Optimize the performance of your web applications with Chrome's performance tools.

Index

Learn about Chrome's features for developing web apps on Android.

Index

Digital accessibility, commonly abbreviated a11y, is about designing and building websites and web apps that disabled people can interact with in a meaningful and equivalent way. This course is created for beginner and advanced web developers. You

Index

Learn about Chrome's identity features, such as Web Authentication.

Blog

Thank you for the time you shared with us, providing feedback, reviewing details and helping shape standards.

Index

Learn about changes to Chrome that affect developers.

Blog

Check out Chrome for Developers' 2024 year-end roundup of the latest web features, capabilities, and tools.

Article

Use the chrome.action API to control the extension's icon in the Google Chrome toolbar. The following keys must be declared in the manifest to use this API. To use the chrome.action API, specify a "manifest_version" of 3 and include the "action" key

Article

Learn the requirements to start building features and applications with built-in AI.

Article

The chrome.extension API has utilities that can be used by any extension page. It includes support for exchanging messages between an extension and its content scripts or between extensions, as described in detail in Message Passing. The type of

Article

Use the chrome.declarativeContent API to take actions depending on the content of a page, without requiring permission to read the page's content. The Declarative Content API allows you to enable your extension's action depending on the URL of a web

Article

Use this API to expose certificates to the platform which can use these certificates for TLS authentications. Typical usage of this API to expose client certificates to ChromeOS follows these steps: The actual sequence of steps can be different. For

Article

Note: this API is deprecated. Check out the declarativeNetRequest API instead. Use the chrome.declarativeWebRequest API to intercept, block, or modify requests in-flight. It is significantly faster than the chrome.webRequest API because you can

Article

Use this API to expose certificates to the platform which can use these certificates for TLS authentications. Typical usage of this API to expose client certificates to ChromeOS follows these steps: The actual sequence of steps can be different. For

Article

The complete reference to all APIs made available to Chrome Extensions. This includes APIs for the deprecated Chrome Apps platform as well as APIs still in beta and dev.

Article

Use the chrome.declarativeContent API to take actions depending on the content of a page, without requiring permission to read the page's content. The Declarative Content API lets you enable your extension's action depending on the URL of a web page,

Article

The chrome.extension API has utilities that can be used by any extension page. It includes support for exchanging messages between an extension and its content scripts or between extensions, as described in detail in Message Passing. The type of

Article

Use the commands API to add keyboard shortcuts that trigger actions in your extension, for example, an action to open the browser action or send a command to the extension. The following keys must be declared in the manifest to use this API. The

Article

The Language Detector API offers built-in language discovery on the web, in the browser.

Article

Use the offscreen API to create and manage offscreen documents. To use the Offscreen API, declare the "offscreen" permission in the extension manifest. For example: Service workers don't have DOM access, and many websites have content security

Article

Use the system.display API to query display metadata. An enum to tell if the display is detected and used by the system. The display is considered 'inactive', if it is not detected by the system (maybe disconnected, or considered disconnected due to

Article

Use the system.display API to query display metadata. An enum to tell if the display is detected and used by the system. The display is considered 'inactive', if it is not detected by the system (maybe disconnected, or considered disconnected due to

Article

Use the Allocation timeline tool to find objects that aren't being properly garbage collected, and continue to retain memory.

Article

How to pass the "Avoid non-composited animations" Lighthouse audit.

Article

This section describes common terms used in memory analysis, and is applicable to a variety of memory profiling tools for different languages.

Blog

Record and analyze a performance trace with DevTools.

Blog

Join the Chrome DevRel team and a skateboarding Chrome Dino on a journey through the latest CSS launched for Chrome and the web platform in 2024.

Blog

Debug network requests, source files, and performance traces with Gemini, view AI chat history, and more.

Article

How to view and edit extension storage with the Extension Storage panel.

Index

An easier and more secure replacement for passwords.

Article

Discover the infinite possibilities of the Prompt API in Chrome Extensions.

Article

Learn more about configuring a strong HTTP Strict Transport Security (HSTS) policy

Blog

The experimental Performance Insights Panel will be removed in January 2025, replaced by new insights within the Performance panel itself.

Index

Discover and explore latest news about and use cases for AI assistance

Index

Browsers, and you, as a developer, can help users enter data faster, and avoid re-entering data. Autofill is a feature that allows browsers to automatically fill in form fields with users' saved information, such as name, address, and payments

Blog

Learn about new AI and rendering features discussed at the latest GPU for the Web working group meeting.

Blog

We've selected ViddyScribe for the Gemini API Developer Competition web award. They exemplified how Gemini can help make videos on the web more accessible by generating audio descriptions for any video.

Blog

How to prepare your extension for the new extensions menu.

Article

Discover the Translator API to empower global customer support.

Blog

Learn how to make performance traces more understandable with the new annotations features in DevTools

Article

Understand performance profiles - with the help of AI

Article

Understand how a website works with the help of AI

Blog

Learn about the latest features shipping in Chrome.

Blog

Live translate text in the browser using local AI models. Now, users can contribute in their first language.

Article

Built-in AI is the latest offering for bringing powerful models to users, while protecting sensitive data and improving latency.

Article

Understand your website's network traffic - with the help of AI

Blog

Introducing Signal API for passkeys on Chrome desktop

Article

Understand your website resources - with the help of AI

Article

The chrome.networking.onc API is used for configuring network connections (Cellular, Ethernet, VPN or WiFi). This API is available in auto-launched Chrome OS kiosk sessions. Network connection configurations are specified following Open Network

Blog

Chrome 131 is rolling out now! More CSS styling for the details element, easier print layout with page margin boxes, and there is plenty more.

Blog

Participate in the origin trial to help users distill lengthy articles, complex documents, or even lively chat conversations into concise and insightful summaries.

Release notes

CSS Highlight Inheritance is changing, more CSS styling for the details element, easier print layout with page margin boxes, and more.

Article

The WebAuthn Signal API allows a relying party to signal the state of existing credentials to the passkey provider, so that the passkeys are consistent with credentials on the server.

Blog

Participate in the Prompt API for Chrome Extensions origin trial and access Gemini Nano in Chrome.

Article

Distill lengthy articles, complex documents, or even lively chat conversations into concise and insightful summaries.

Article

Test a new or experimental web platform feature. Give feedback to the web standards community on the feature's usability, practicality, and effectiveness, before the feature is made available to all users.

Blog

Clip distances in WGSL, GPUCanvasContext getConfiguration(), point and line primitives must not have depth bias, inclusive scan built-in functions for subgroups, experimental support for multi-draw indirect, shader module compilation option strict math, remove GPUAdapter requestAdapterInfo(), and more.

Article

Learn how to use Chrome and DevTools to find memory issues that affect page performance, including memory leaks, memory bloat, and frequent garbage collections.

Blog

You can now set the display type and also style the container for the part that expands and collapses using the new ::details-content pseudo-element.

Article

Gain deep insight into memory allocation, investigate low level memory issues, and manage garbage collection.

Blog

Seamless credential sharing lets you securely signal to password managers that your users can sign in using the same credentials across your Android app and website.

Article

A list of ways you can customize Chrome DevTools: Change theme, placement, panel order, language, and more.

Article

Toggle various overlays and speed up DOM tree navigation with badges.

Blog

Monitor live Core Web Vitals metrics in the Performance panel.

Blog

Debug CSS with Gemini, annotate findings and get insights in the Performance panel, spot excessive layout shifts and non-composited animations, and more.

Article

The Handwriting Recognition API allows web applications to use advanced handwriting recognition services to recognize text from handwritten input in real time.

Blog

Create custom headers and footers when printing webpages.

Article

Learn why WebGPU may be disabled or not working in Chrome browser.

Article

Learn how to evaluate runtime performance in Chrome DevTools.

Blog

Chrome 132 no longer includes the old Headless mode. Migrate to chrome-headless-shell or the new Headless mode.

Blog

Learn how DevTools' new scroll badge simplifies debugging scrollable elements (and how we built it!).

Article

Use the chrome.syncFileSystem API to save and synchronize data on Google Drive. This API is NOT for accessing arbitrary user docs stored in Google Drive. It provides app-specific syncable storage for offline and caching usage so that the same data

Article

Chrome is making a change to allow bfcache usage for pages using Cache-Control: no-store when this is safe to do. Find out what that means for developers.

Article

Chrome's Headless mode is now more useful for developers, by bringing it closer to Chrome's regular "headful" mode.

Blog

Learn about fun and exciting use-cases of the new AI assistance panel in DevTools

Article

Built-in AI is the latest offering for bringing powerful models to users, while protecting sensitive data and improving latency.

Product

Debug and optimize your web applications with Chrome DevTools.

Blog

Discover the features that are coming to Chrome with the latest beta.

Blog

Dual source blending, shader compilation time improvements on Metal, deprecation of GPUAdapter requestAdapterInfo(), and more.

Release notes

Chrome 130 is rolling out now! Document picture in picture gives you more control over picture in picture windows, CSS Nested declarations fix some tricky edge cases, and you can specify how decorations on elements split across multiple lines behave, and there's plenty more!

Article

Understand how a website is styled with the help of AI in DevTools.

Blog

Chrome 130 is rolling out now! Document picture in picture gives you more control over picture in picture windows, CSS Nested declarations fix some tricky edge cases, and you can specify how decorations on elements split across multiple lines behave. Pete LePage has all the details about what's new for developers in Chrome 130.

Article

Use the chrome.downloads API to programmatically initiate, monitor, manipulate, and search for downloads. You must declare the "downloads" permission in the extension manifest to use this API. You can find simple examples of using the

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Use the chrome.webRequest API to observe and analyze traffic and to intercept, block, or modify requests in-flight. You must declare the "webRequest" permission in the extension manifest to use the web request API, along with the necessary host

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The Desktop Capture API captures the content of the screen, individual windows, or individual tabs. Enum used to define set of desktop media sources used in chooseDesktopMedia(). "screen" "window" "tab" "audio" Mirrors SelfCapturePreferenceEnum.

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Use the chrome.vpnProvider API to implement a VPN client. Typical usage of vpnProvider is as follows: Create VPN configurations using the createConfig method. A VPN configuration is a persistent entry shown to the user in a native ChromeOS UI. The

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Use the chrome.platformKeys API to access client certificates managed by the platform. If the user or policy grants the permission, an extension can use such a certficate in its custom authentication protocol. E.g. this allows usage of platform

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Use the chrome.identity API to get OAuth2 access tokens. string A unique identifier for the account. This ID will not change for the lifetime of the account. "SYNC" Specifies that Sync is enabled for the primary account. "ANY" Specifies the existence

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Use the chrome.systemLog API to record Chrome system logs from extensions. string Adds a new log record. MessageOptions The logging options. function optional The callback parameter looks like: Promise<void> Promises are supported in Manifest

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Use the chrome.webNavigation API to receive notifications about the status of navigation requests in-flight. All chrome.webNavigation methods and events require you to declare the "webNavigation" permission in the extension manifest. For example: For

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Use the chrome.printingMetrics API to fetch data about printing usage. "BLACK_AND_WHITE" Specifies that black and white mode was used. "COLOR" Specifies that color mode was used. "ONE_SIDED" Specifies that one-sided printing was used.

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Use the chrome.loginState API to read and monitor the login state. "SIGNIN_PROFILE" Specifies that the extension is in the signin profile. "USER_PROFILE" Specifies that the extension is in the user profile. "UNKNOWN" Specifies that the session state

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The chrome.management API provides ways to manage installed apps and extensions. You must declare the "management" permission in the extension manifest to use the management API. For example: management.getPermissionWarningsByManifest(),

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Use the chrome.fileSystemProvider API to create file systems, that can be accessible from the file manager on Chrome OS. You must declare the "fileSystemProvider" permission and section in the extension manifest to use the File System Provider API.

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Use the chrome.enterprise.hardwarePlatform API to get the manufacturer and model of the hardware platform where the browser runs. Note: This API is only available to extensions installed by enterprise policy. string string Obtains the manufacturer

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Use the chrome.power API to override the system's power management features. Using this API, you can specify the Level to which power management is disabled. The "system" level keeps the system active, but allows the screen to be dimmed or turned

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Use the chrome.identity API to get OAuth2 access tokens. string A unique identifier for the account. This ID will not change for the lifetime of the account. "SYNC" Specifies that Sync is enabled for the primary account. "ANY" Specifies the existence

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Use the chrome.notifications API to create rich notifications using templates and show these notifications to users in the system tray. string optional Button icons not visible for Mac OS X users. string string Additional details about this item.

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Use the chrome.processes API to interact with the browser's processes. number The part of the cache that is utilized, in bytes. number The size of the cache, in bytes. number optional The most recent measurement of the process's CPU usage, expressed

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Use the chrome.wallpaper API to change the ChromeOS wallpaper. You must declare the "wallpaper" permission in the app's manifest to use the wallpaper API. For example: For example, to set the wallpaper as the image at https://example.com/a_file.png,

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Use the chrome.notifications API to create rich notifications using templates and show these notifications to users in the system tray. string optional Button icons not visible for Mac OS X users. string string Additional details about this item.

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The complete reference to all APIs made available to Chrome Extensions. This includes APIs for the deprecated Chrome Apps platform as well as APIs still in beta and dev.

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Use the chrome.tts API to play synthesized text-to-speech (TTS). See also the related ttsEngine API, which allows an extension to implement a speech engine. Chrome provides this capability on Windows (using SAPI 5), Mac OS X, and ChromeOS,

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Use the chrome.input.ime API to implement a custom IME for Chrome OS. This allows your extension to handle keystrokes, set the composition, and manage the candidate window. You must declare the "input" permission in the extension manifest to use the

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The chrome.debugger API serves as an alternate transport for Chrome's remote debugging protocol. Use chrome.debugger to attach to one or more tabs to instrument network interaction, debug JavaScript, mutate the DOM and CSS, and more. Use the Debuggee

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Use the chrome.devtools.panels API to integrate your extension into Developer Tools window UI: create your own panels, access existing panels, and add sidebars. The following keys must be declared in the manifest to use this API. See DevTools APIs

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Use the chrome.browsingData API to remove browsing data from a user's local profile. You must declare the "browsingData" permission in the extension manifest to use this API. The simplest use-case for this API is a a time-based mechanism for clearing

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The chrome.management API provides ways to manage installed apps and extensions. You must declare the "management" permission in the extension manifest to use the management API. For example: management.getPermissionWarningsByManifest,

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Use the chrome.sidePanel API to host content in the browser's side panel alongside the main content of a webpage. To use the Side Panel API, add the "sidePanel" permission in the extension manifest file: manifest.json: The Side Panel API allows

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Use the chrome.tabCapture API to interact with tab media streams. The chrome.tabCapture API allows you to access a MediaStream containing video and audio of the current tab. It can only be called after the user invokes an extension, such as

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Use the chrome.windows API to interact with browser windows. You can use this API to create, modify, and rearrange windows in the browser. When requested, a windows.Window contains an array of tabs.Tab objects. You must declare the "tabs" permission

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Use the chrome.browsingData API to remove browsing data from a user's local profile. You must declare the "browsingData" permission in the extension manifest to use this API. The simplest use-case for this API is a a time-based mechanism for clearing

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Use the chrome.documentScan API to discover and retrieve images from attached document scanners. The Document Scan API is designed to allow apps and extensions to view the content of paper documents on an attached document scanner. string Provides

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Use the chrome.windows API to interact with browser windows. You can use this API to create, modify, and rearrange windows in the browser. When requested, a windows.Window contains an array of tabs.Tab objects. You must declare the "tabs" permission

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Use the chrome.fontSettings API to manage Chrome's font settings. To use the Font Settings API, you must declare the "fontSettings" permission in the extension manifest. For example: Chrome allows for some font settings to depend on certain generic

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This permission triggers a warning Use the chrome.downloads API to programmatically initiate, monitor, manipulate, and search for downloads. You must declare the "downloads" permission in the extension manifest to use this API. You can find simple

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The chrome.declarativeNetRequest API is used to block or modify network requests by specifying declarative rules. This lets extensions modify network requests without intercepting them and viewing their content, thus providing more privacy. The "

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Use the chrome.webNavigation API to receive notifications about the status of navigation requests in-flight. All chrome.webNavigation methods and events require you to declare the "webNavigation" permission in the extension manifest. For example: For

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The chrome.debugger API serves as an alternate transport for Chrome's remote debugging protocol. Use chrome.debugger to attach to one or more tabs to instrument network interaction, debug JavaScript, mutate the DOM and CSS, and more. Use the Debuggee

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Use the chrome.enterprise.deviceAttributes API to read device attributes. Note: This API is only available to extensions force-installed by enterprise policy. Fetches the administrator-annotated Location. If the current user is not affiliated or no

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Use chrome.gcm to enable apps and extensions to send and receive messages through Firebase Cloud Messaging (FCM). The maximum size (in bytes) of all key/value pairs in a message. 4096 Registers the application with FCM. The registration ID will be

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Use browser actions to put icons in the main Google Chrome toolbar, to the right of the address bar. In addition to its icon, a browser action can have a tooltip, a badge, and a popup. In the following figure, the multicolored square to the right of

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A tutorial on the most popular network-related features in Chrome DevTools.

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AI Innovations tab reference.

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Learn about the Long Animation Frames API (LoAF) which is the next iteration of the Long Tasks API and allows measuring frame update delays with attribution

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An overview of the recent changes in Chrome Extensions, plus exciting upcoming extensions features developers can look forward to.

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A sandbox for running compiled C and C++ code in the browser. This has been deprecated.

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Chrome 130 includes full, unprefixed box-decoration-break support.

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The Private Network Access (PNA) rollout is on hold.

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A change to CSS highlight inheritance is coming in Chrome 134.

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The Translation API is now available for built-in AI Early Preview Program participants.

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Position elements relative to each other using the anchor positioning API.

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Learn how the DevTools debugger predicts whether an exception is caught.

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Emulate Authenticators and Debug WebAuthn in Chrome DevTools.

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We're launching the Built-in AI Challenge, where we invite you to reimagine what's possible with Gemini Nano in Chrome.

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We're excited to launch a set of UI changes making the Chrome Web Store Developer Dashboard more responsive and mobile-friendly. We hope this gives you a more convenient and accessible experience when monitoring store listing performance, making

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Recommendations for live metrics and breadcrumbs you can navigate in the Performance panel, network filters reimagined, sanitized HAR exports, and more.

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Find text across all loaded resources with the Search panel.

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A comprehensive reference of Chrome DevTools Recorder panel features.

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View and edit files, create Snippets, debug JavaScript, and set up Workspaces in the Sources panel of Chrome DevTools.

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How to find and analyze unused JavaScript and CSS code in Chrome DevTools.

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Get started with same-document view transitions for use in your single-page application.

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Inspect the layers that make up your website.

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Inspect and troubleshoot cache with DevTools.

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The Language Detection API is now available in a Chrome origin trial.

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The Web Vitals extension will merge with the Performance panel of Chrome DevTools, ending standalone support in January 2025.

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The main uses of the Chrome DevTools Console are logging messages and running JavaScript.

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The optional `id` property is part of the web app manifest spec, and allows you to explicitly define the identifier used for your PWA. Adding the `id` property to the manifest removes the dependency on the `start_url` or the location of the manifest, and makes it possible for them to be updated in the future.

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A comparison of the two proposed masonry specifications.

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EPP participants can now prototype with write and rewrite APIs in Chrome.

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Chrome on desktop will soon be able to create passkeys in Google Password Manager (GPM) and synchronize them across those platforms in addition to Android.

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Test your site with the features and changes in the latest Chrome beta.

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Chrome 129 is rolling out now! You can yield in long tasks - to improve performance, you can animate elements with intrinsic sizes, there are some changes to anchor positioning syntax, and there's plenty more. Pete LePage has all the details about what's new for developers in Chrome 129.

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Analyze your website's load and runtime performance

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The Performance panel in Chrome DevTools features a new way to monitor your local Core Web Vitals performance and compare it against real-user data from the field.

Release notes

Chrome 129 is rolling out now! You can yield in long tasks to improve performance, you can animate elements with intrinsic sizes, there are some changes to anchor positioning syntax, and there's plenty more.

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Animate to and from intrinsic sizing keywords with `interpolate-size` and `calc-size()`

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HDR support with canvas tone mapping mode, expanded subgroups support, and more.

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The Process sharing experiment and its impact Chrome DevTools' developer experience.

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Learn how to detect when a Bluetooth RFCOMM serial port is available with Web Serial.

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Use the chrome.devtools.performance API to listen to recording status updates in the Performance panel in DevTools. See DevTools APIs summary for general introduction to using Developer Tools APIs. The chrome.devtools.performance API allows

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The chrome.declarativeNetRequest API is used to block or modify network requests by specifying declarative rules. This lets extensions modify network requests without intercepting them and viewing their content, thus providing more privacy.

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An early look at the new customizable select feature.

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Freeze elements in the DOM so that you can inspect them with DevTools.

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Display arbitrary HTML content in an always-on-top window.

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The Keyboard Lock API lets developers provide an immersive, full screen experience for a variety of use cases, including interactive websites, games, and remote desktop or application streaming. It does so by enabling websites to use all available

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Use the Memory inspector to inspect an ArrayBuffer, TypedArray, or DataView in JavaScript as well as WebAssembly.Memory of C++ Wasm apps.

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Track changes to HTML, CSS, and JavaScript.

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Changes related to the anchor positioning API you should be aware of.

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If you employ multiple domains that share the same account management backend, with Digital Asset Links you can now also seamlessly share credential across them to enable users to save credentials once and have the Chrome password manager suggest them to any of the associated websites.

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A guide on how to open the Command Menu, run commands, open files, see other actions, and more.

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An origin trial for the Digital Credentials API is starting from Chrome 128. Digital Credentials API is a new web platform API that allows websites to selectively request verifiable information about the user through digital credentials such as a driver's license or a national identification card stored in a digital wallet.

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Search requests in Performance > Network, use test data in address forms with Autofill, export to Puppeteer for Firefox in the Recorder panel, spot performance issues at a glance with observations in the Performance panel, and more.

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WebAuthn on Chrome can now use hints, Related Origin Requests and JSON serialization

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Do you agree with the CSS Day attendees about what should be added to the web?

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A new optimization in Chrome improves how IndexedDB data is stored on disk. This document summarizes the key points of this update.

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EPP participants can now prototype with a language detection API in Chrome.

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Make your websites load faster with Chrome Lighthouse.

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Customize performance data with the extensibility API

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Get a preview of the next Chrome release with this post detailing the features in the current beta.

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A post from Ahmed Elwasefi, sharing how he became a Chromium contributor through the Google Summer of Code.

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Chrome 128 is rolling out now! With improved display for ruby elements with line breaks, Promise.try to start Promise chains easier, PointerEvent interface extended to uniquely identify multiple pens, and there's plenty more, and plenty more. Adriana Jara has all the details about what's new for developers in Chrome 128.

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Use the Media Panel to view information and debug the media players per browser tab.

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Experimenting with subgroups, deprecate setting depth bias for lines and points, hide uncaptured error DevTools warning if preventDefault, WGSL interpolate sampling first and either, and more.

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The Chrome team is experimenting with a new File System Observer API that informs developers of changes to the file system.

Release notes

Chrome 128 is starting to roll out on August 20th, 2024, with CSS ruby-align property, Promise.try, and there's plenty more.

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Learn how to build an app with WebGPU for the web and specific platforms.

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Chrome Extensions can be either packed or unpacked. To pack an unpacked extension, use the Pack button in chrome://extensions or use Chrome: "chrome.exe --pack-extension=C:\path\to\unpacked\extension --pack-extension-key=C:\myext.pem". To unpack a

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The File System Access API enables developers to build powerful web apps that interact with files on the user's local device, such as IDEs, photo and video editors, text editors, and more. After a user grants a web app access, this API allows them to read or save changes directly to files and folders on the user's device.

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Use the chrome.devtools.network API to retrieve the information about network requests displayed by the Developer Tools in the Network panel. Network requests information is represented in the HTTP Archive format ( HAR ). The description of HAR is

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EPP participants can now prototype with the summarization API for Gemini Nano in Chrome.

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Use the chrome.devtools.panels API to integrate your extension into Developer Tools window UI: create your own panels, access existing panels, and add sidebars. Each extension panel and sidebar is displayed as a separate HTML page. All extension

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Introducing two new JavaScript events: scrollSnapChange and scrollSnapChanging.

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The Chrome team is working on better measuring so-called soft navigations used by Single Page Applications and a new API is now available behind a flag to allow sites to experiment with this too.

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Discover 4 unique ways to capture screenshots with DevTools.

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Puppeteer 23 introduces stable support for Firefox 129 and up, offering a unified API for Chrome and Firefox automation, based on WebDriver BiDi.

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Console insights go live in Europe, enhanced Network track and API to customize tracks in the Performance panel, and more.

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An update on built-in AI, the Prompt API, and Chrome's AI plans.

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Chrome on Android now integrates the Credential Manager allowing 3P password managers provide passkeys on Android 14 and later

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Explaining the current interoperability status of author-defined names as used in the shadow DOM in CSS.

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Best practices on how to make a high-quality, engaging listing page for your item in the Chrome Web Store.

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BrowserStack introduces WebDriver BiDi support: Enhance your Selenium Grid tests with event-driven automation.

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Learn how the DevTools team improved how styles are presented in the Styles tab.

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Find out how your server can send hints to the browser about critical subresources.

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Analyze network load and resources

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Line-breakable ruby element and CSS ruby-align property

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Get a preview of the next Chrome release with this post detailing the features in the current beta.

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Chrome 127 is rolling out now! With support for font-size-adjust, user activations propagated in the Document Picture-in-Picture API, keyboard focusable scroll containers and there's plenty more. Adriana Jara has all the details about what's new for developers in Chrome 127.

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Experimental support for OpenGL ES on Android, GPUAdapter info attribute, WebAssembly interop improvements, and more.

Release notes

Chrome 127 is starting to roll out on July 23rd, 2024, with CSS font-size-adjust, keyboard focusable scroll containers, and there's plenty more.

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Chrome's internal user research shows that many people value installing web apps. There are many benefits such as: There are multiple ways Chrome and web developers can help, including a new machine learning promotion feature. This post gives an

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Help us to make sure reading-flow meets your needs.

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A comprehensive reference of Chrome DevTools Network panel features.

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Preferences tab reference.

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If you have a general question or need help using ChromeDriver, you can email the chromedriver-users group. Before filing a bug, look at the existing issues for the same topic. ChromeDriver is an open source project, worked on by various

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ChromeDriver clicking works by simulating a mouse click in the middle of the element's first client rect (or bounding client rect if it doesn't have a first client rect). The easiest way to find out where ChromeDriver is attempting to click is to

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ChromeDriver is a Chromium project and the code lives in the Chromium repository. Chromium is the open source project on which Google Chrome is based. Follow the instructions to check out the entire Chromium source tree. After you have your source

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Analyze and record user flows.

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With more and more people starting to look into the View Transition API, it's time to debunk some misconceptions.

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Frequently asked questions about Chrome Web Store's policies on deceptive installation tactics.

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An overview of the recent changes in Chrome Extensions, plus exciting upcoming extension features developers can look forward to.

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If your product has a blank description field or is missing an icon or screenshots, it will be rejected. Ensure your product's listing information is up to date, accurate, and comprehensive. We don't allow extensions with misleading, inaccurate,

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Extensions must be marketed responsibly. The set of functionalities promised by the extension must be stated clearly and in a transparent manner. The outcome of any user interaction should match the reasonable expectations that were set with the

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Research and understand the Chrome Web Store policies. Before developing a Chrome extension, it is important to review the Chrome Web Store Developer Program Policies and ensure your extension complies with all guidelines and requirements. Extensions

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Frequently asked questions about the single purpose policy.

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An extension must have a single purpose that is narrow and easy to understand. Don't create an extension that requires users to accept bundles of unrelated functionality. If two pieces of functionality are clearly separate, they should be put into

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This announcement includes a series of updates to Developer Program Policies page designed to encourage the development of high quality products, prevent deceptive behavior, and ensure informed user consent.

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Use the chrome.input.ime API to implement a custom IME for Chrome OS. This allows your extension to handle keystrokes, set the composition, and manage the candidate window. You must declare the "input" permission in the extension manifest to use the

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CSS anchor positioning in Elements, enhanced 'Never Pause Here' in Sources, new scroll snap event listeners, updated network throttling presets, and more.

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Inspect elements on your web app

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A reference on all the ways to record and analyze performance in Chrome DevTools.

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A collaboration between Chrome and open-source web frameworks to improve user experience on the web.

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The Long Animation Frame API (LoAF) has shipped from Chrome 123 and we've now also updated our tooling and guidance to help you make the most of this new API.

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YouTube is enhancing platform security with Trusted Types to prevent cross-site scripting attacks, but it may impact your extension.

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Learn how a large DOM can reduce your web page's performance and how you can reduce the size of your DOM at load time.

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Technical documentation on CrUX eligibility, metrics, dimensions and accessing the data.

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Use the chrome.enterprise.networkingAttributes API to read information about your current network. Note: This API is only available to extensions force-installed by enterprise policy. string optional The device's local IPv4 address (undefined if not

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Use the chrome.enterprise.hardwarePlatform API to get the manufacturer and model of the hardware platform where the browser runs. Note: This API is only available to extensions installed by enterprise policy. string string Obtains the manufacturer

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Use the chrome.enterprise.deviceAttributes API to read device attributes. Note: This API is only available to extensions force-installed by enterprise policy. Fetches the administrator-annotated Location. If the current user is not affiliated or no

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Use the chrome.enterprise.networkingAttributes API to read information about your current network. Note: This API is only available to extensions force-installed by enterprise policy. string optional The device's local IPv4 address (undefined if not

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The Chrome team has been working on options to bring back full prerendering of future pages that a user is likely to navigate to.

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We sat down with the team that leads review in the Chrome Web Store.

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The Chrome team has made a number of performance-related improvements to the implementation of IndexedDB (IDB).

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Chrome's latest releases

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To make future launches of your AI-powered applications faster, explicitly cache the model data on-device.

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Increase maxTextureArrayLayers limit, buffer upload optimization for Vulkan backend, shader compilation time improvements, submitted command buffers must be unique, and Dawn updates.

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Test the latest features coming to Chrome by downloading the beta.

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The Chrome team is experimenting with a new declarative HTML <permission> element for asking the user for access to powerful features.

Release notes

Chrome 126 is starting to roll out on June 11th, 2024, with cross document view transitions, reenabling the CloseWatcher API, trigger-rumble for the Gamepad API, and there's plenty more.

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Read all of the CSS and Web UI announcements from Google I/O 2024.

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Chrome 126 is rolling out now! With support for cross-document transitions in the ViewTransitions API, the CloseWatcher API re-enabled, trigger-rumbled for the Gamepad API and there's plenty more, and plenty more. Adriana Jara has all the details about what's new for developers in Chrome 126.

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The unload event will be gradually deprecated starting from Chrome 117. Learn what this means and how sites and enterprises can prepare for this

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Learn about the latest features to help you declutter the Performance panel and focus on the information you need most

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Monitor CDP requests and responses.

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Analyze CSS selector performance during Recalculate Style events.

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Build progressive web apps (PWAs) with Workbox - the Service Worker library from the Chrome team

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Learn how to develop extensions

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We are excited to announce a new feature that will allow developers to skip the review process for eligible changes to Manifest V3 extensions using the Declarative Net Request API.

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An explanation of content filtering and how to approach it in your Chrome Extension.

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Learn about the "Does not have a tag with width or initial-scale" Lighthouse audit.

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Reference for APIs available to Chrome Apps

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The chrome.types API contains type declarations for Chrome. The ChromeSetting prototype provides a common set of functions ( get(), set(), and clear() ) as well as an event publisher ( onChange ) for settings of the Chrome browser. The proxy

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The chrome.virtualKeyboard API is a kiosk only API used to configure virtual keyboard layout and behavior in kiosk sessions. boolean optional Whether virtual keyboards can provide auto-complete. boolean optional Whether virtual keyboards can provide

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Use the chrome.tabCapture API to interact with tab media streams. The chrome.tabCapture API lets you access a MediaStream containing video and audio of the current tab. It can only be called after the user invokes an extension, such as by clicking

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Use the chrome.topSites API to access the top sites (i.e. most visited sites) that are displayed on the new tab page. These do not include shortcuts customized by the user. You must declare the "topSites" permission in your extension's manifest to

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The Desktop Capture API captures the content of the screen, individual windows, or individual tabs. Enum used to define set of desktop media sources used in chooseDesktopMedia(). "screen" "window" "tab" "audio" Mirrors SelfCapturePreferenceEnum.

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Use the chrome.platformKeys API to access client certificates managed by the platform. If the user or policy grants the permission, an extension can use such a certficate in its custom authentication protocol. E.g. this allows usage of platform

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The chrome.system.memory API. number The amount of available capacity, in bytes. number The total amount of physical memory capacity, in bytes. Get physical memory information. function optional The callback parameter looks like: MemoryInfo

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Use chrome.instanceID to access the Instance ID service. Resets the app instance identifier and revokes all tokens associated with it. function optional The callback parameter looks like: Promise&lt;void&gt; Promises are supported in Manifest V3 and

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The chrome.events namespace contains common types used by APIs dispatching events to notify you when something interesting happens. An Event is an object that lets you be notified when something interesting happens. Here's an example of using the

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Use the chrome.dom API to access special DOM APIs for Extensions Gets the open shadow root or the closed shadow root hosted by the specified element. If the element doesn't attach the shadow root, it will return null. HTMLElement object See

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Use the chrome.system.storage API to query storage device information and be notified when a removable storage device is attached and detached. "success" The ejection command is successful -- the application can prompt the user to remove the device.

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Use the chrome.processes API to interact with the browser's processes. number The part of the cache that is utilized, in bytes. number The size of the cache, in bytes. number optional The most recent measurement of the process's CPU usage, expressed

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Use the chrome.power API to override the system's power management features. Using this API, you can specify the Level to which power management is disabled. The "system" level keeps the system active, but allows the screen to be dimmed or turned

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The chrome.clipboard API is provided to allow users to access data of the clipboard. This is a temporary solution for chromeos platform apps until open-web alternative is available. It will be deprecated once open-web solution is available, which

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The chrome.types API contains type declarations for Chrome. The ChromeSetting type provides a common set of functions ( get(), set(), and clear() ) as well as an event publisher ( onChange ) for settings of the Chrome browser. The proxy

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The chrome.bluetoothLowEnergy API is used to communicate with Bluetooth Smart (Low Energy) devices using the Generic Attribute Profile (GATT). The following keys must be declared in the manifest to use this API. ManufacturerData [] optional List of

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Use the chrome.bluetoothSocket API to send and receive data to Bluetooth devices using RFCOMM and L2CAP connections. The following keys must be declared in the manifest to use this API. "system_error" A system error occurred and the connection may be

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Use the chrome.fileBrowserHandler API to extend the Chrome OS file browser. For example, you can use this API to enable users to upload files to your website. The ChromeOS file browser comes up when the user either presses Alt+Shift+M or connects an

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Use the chrome.search API to search via the default provider. "CURRENT_TAB" Specifies that the search results display in the calling tab or the tab from the active browser. "NEW_TAB" Specifies that the search results display in a new tab.

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Use the chrome.i18n infrastructure to implement internationalization across your whole app or extension. You need to put all of its user-visible strings into a file named messages.json. Each time you add a new locale, you add a messages file under a

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Use the system.cpu API to query CPU metadata. string The architecture name of the processors. string[] A set of feature codes indicating some of the processor's capabilities. The currently supported codes are "mmx", "sse", "sse2", "sse3", "ssse3",

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Use chrome.gcm to enable apps and extensions to send and receive messages through Firebase Cloud Messaging (FCM). The maximum size (in bytes) of all key/value pairs in a message. 4096 Registers the application with FCM. The registration ID will be

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Use the chrome.mdns API to discover services over mDNS. This comprises a subset of the features of the NSD spec: http://www.w3.org/TR/discovery-api/ string The IP address of an mDNS advertised service. string[] Metadata for an mDNS advertised

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Use the chrome.tts API to play synthesized text-to-speech (TTS). See also the related ttsEngine API, which allows an extension to implement a speech engine. Chrome provides native support for speech on Windows (using SAPI 5), Mac OS X, and ChromeOS,

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Use the chrome.serial API to read from and write to a device connected to a serial port. number optional See ConnectionOptions.bitrate. This field may be omitted or inaccurate if a non-standard bitrate is in use, or if an error occurred while

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Use the chrome.vpnProvider API to implement a VPN client. Typical usage of chrome.vpnProvider is as follows: Create VPN configurations by calling createConfig(). A VPN configuration is a persistent entry shown to the user in a ChromeOS UI. The user

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Use the chrome.contextMenus API to add items to Google Chrome's context menu. You can choose what types of objects your context menu additions apply to, such as images, hyperlinks, and pages. Context menu items can appear in any document (or frame

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Use the chrome.devtools.network API to retrieve the information about network requests displayed by the Developer Tools in the Network panel. The following keys must be declared in the manifest to use this API. See DevTools APIs summary for general

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Use the chrome.bluetooth API to connect to a Bluetooth device. All functions report failures via chrome.runtime.lastError. The following keys must be declared in the manifest to use this API. string The address of the adapter, in the format

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The omnibox API allows you to register a keyword with Google Chrome's address bar, which is also known as the omnibox. When the user enters your extension's keyword, the user starts interacting solely with your extension. Each keystroke is sent to

Article

The chrome.events namespace contains common types used by APIs dispatching events to notify you when something interesting happens. An Event is an object that allows you to be notified when something interesting happens. Here's an example of using

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Use the chrome.dns API for dns resolution. To use this API, you must declare the "dns" permission in the manifest. The following code calls resolve() to retrieve the IP address of example.com. service-worker.js: string optional A string representing

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Use the chrome.idle API to detect when the machine's idle state changes. You must declare the "idle" permission in your extension's manifest to use the idle API. For example: "active" "idle" "locked" Gets the time, in seconds, it takes until the

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Use the chrome.wallpaper API to change the ChromeOS wallpaper. You must declare the "wallpaper" permission in the app's manifest to use the wallpaper API. For example: For example, to set the wallpaper as the image at https://example.com/a_file.png,

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Use chrome.instanceID to access the Instance ID service. Resets the app instance identifier and revokes all tokens associated with it. function optional The callback parameter looks like: Promise&lt;void&gt; Promises are only supported for Manifest

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Use the chrome.accessibilityFeatures API to manage Chrome's accessibility features. This API relies on the ChromeSetting prototype of the type API for getting and setting individual accessibility features. In order to get feature states the extension

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Use the chrome.fontSettings API to manage Chrome's font settings. To use the Font Settings API, you must declare the "fontSettings" permission in the extension manifest. For example: Chrome allows for some font settings to depend on certain generic

Article

Use the chrome.pageAction API to put icons in the main Google Chrome toolbar, to the right of the address bar. Page actions represent actions that can be taken on the current page, but that aren't applicable to all pages. Page actions appear grayed

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Use the chrome.devtools.inspectedWindow API to interact with the inspected window: obtain the tab ID for the inspected page, evaluate the code in the context of the inspected window, reload the page, or obtain the list of resources within the page.

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Use the chrome.history API to interact with the browser's record of visited pages. You can add, remove, and query for URLs in the browser's history. To override the history page with your own version, see Override Pages. You must declare the

Article

Use the chrome.sockets.tcpServer API to create server applications using TCP connections. This API supersedes the TCP functionality previously found in the chrome.socket API. The following keys must be declared in the manifest to use this API. number

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Use the commands API to add keyboard shortcuts that trigger actions in your extension, for example, an action to open the browser action or send a command to the extension. The following keys must be declared in the manifest to use this API. The

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Use the chrome.readingList API to read from and modify the items in the Reading List. To use the Reading List API, add the "readingList" permission in the extension manifest file: manifest.json: Chrome features a reading list located on the side

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Use the chrome.proxy API to manage Chrome's proxy settings. This API relies on the ChromeSetting prototype of the type API for getting and setting the proxy configuration. You must declare the "proxy" permission in the extension manifest to use the

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Use the chrome.socket API to send and receive data over the network using TCP and UDP connections. Note: Starting with Chrome 33, this API is deprecated in favor of the sockets.udp, sockets.tcp and sockets.tcpServer APIs. number number optional The

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Use the chrome.alarms API to schedule code to run periodically or at a specified time in the future. To use the chrome.alarms API, declare the "alarms" permission in the manifest: To ensure reliable behavior, it is helpful to understand how the API

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Use the chrome.system.storage API to query storage device information and be notified when a removable storage device is attached and detached. "success" The ejection command is successful -- the application can prompt the user to remove the device.

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Use the chrome.fileBrowserHandler API to extend the Chrome OS file browser. For example, you can use this API to enable users to upload files to your website. The ChromeOS file browser comes up when the user either presses Alt+Shift+M or connects an

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Use the chrome.devtools.recorder API to customize the Recorder panel in DevTools. See DevTools APIs summary for general introduction to using Developer Tools APIs. devtools.recorder API is a preview feature that allows you to extend the Recorder

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Use the chrome.webRequest API to observe and analyze traffic and to intercept, block, or modify requests in-flight. You must declare the "webRequest" permission in the extension manifest to use the web request API, along with the necessary host

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The chrome.webAuthenticationProxy API lets remote desktop software running on a remote host intercept Web Authentication API (WebAuthn) requests in order to handle them on a local client. string The PublicKeyCredentialCreationOptions passed to

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The omnibox API allows you to register a keyword with Google Chrome's address bar, which is also known as the omnibox. When the user enters your extension's keyword, the user starts interacting solely with your extension. Each keystroke is sent to

Article

Use the chrome.documentScan API to discover and retrieve images from attached document scanners.

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Use the chrome.idle API to detect when the machine's idle state changes. You must declare the "idle" permission in your extension's manifest to use the idle API. For example: "active" "idle" "locked" Gets the time, in seconds, it takes until the

Article

Use the chrome.dns API for dns resolution. To use this API, you must declare the "dns" permission in the manifest. The following code calls resolve() to retrieve the IP address of example.com. service-worker.js: string optional A string representing

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Use the chrome.tabGroups API to interact with the browser's tab grouping system. You can use this API to modify and rearrange tab groups in the browser. To group and ungroup tabs, or to query what tabs are in groups, use the chrome.tabs API. The

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Use the chrome.systemLog API to record Chrome system logs from extensions. string Adds a new log record. MessageOptions The logging options. function optional The callback parameter looks like: Promise&lt;void&gt; Promises are only supported for

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The chrome.audio API is provided to allow users to get information about and control the audio devices attached to the system. This API is currently only available in kiosk mode for ChromeOS. string Device name. DeviceType Type of the device. string

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The chrome.printerProvider API exposes events used by print manager to query printers controlled by extensions, to query their capabilities and to submit print jobs to these printers. string optional Printer's human readable description. string

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The chrome.printerProvider API exposes events used by print manager to query printers controlled by extensions, to query their capabilities and to submit print jobs to these printers. string optional Printer's human readable description. string

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The chrome.audio API is provided to allow users to get information about and control the audio devices attached to the system. This API is currently only available in kiosk mode for ChromeOS. string Device name. DeviceType Type of the device. string

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Use the chrome.proxy API to manage Chrome's proxy settings. This API relies on the ChromeSetting prototype of the type API for getting and setting the proxy configuration. You must declare the "proxy" permission in the extension manifest to use the

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Use the chrome.topSites API to access the top sites (i.e. most visited sites) that are displayed on the new tab page. These do not include shortcuts customized by the user. You must declare the "topSites" permission in your extension's manifest to

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Use the webview tag to actively load live content from the web over the network and embed it in your Chrome App. Your app can control the appearance of the webview and interact with the web content, initiate navigations in an embedded web page, react

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Use the chrome.search API to search via the default provider. "CURRENT_TAB" Specifies that the search results display in the calling tab or the tab from the active browser. "NEW_TAB" Specifies that the search results display in a new tab.

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Use the chrome.app.window API to create windows. Windows have an optional frame with title bar and size controls. They are not associated with any Chrome browser windows. See the Window State Sample for a demonstration of these options. Window The

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Use the chrome.alarms API to schedule code to run periodically or at a specified time in the future. To use the chrome.alarms API, declare the "alarms" permission in the manifest: The following examples show how to use and respond to an alarm. To try

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Use the chrome.scripting API to execute script in different contexts. To use the chrome.scripting API, declare the "scripting" permission in the manifest plus the host permissions for the pages to inject scripts into. Use the "host_permissions" key

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Use the chrome.loginState API to read and monitor the login state. "SIGNIN_PROFILE" Specifies that the extension is in the signin profile. "USER_PROFILE" Specifies that the extension is in the user profile. "UNKNOWN" Specifies that the session state

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Use the chrome.system.network API. string The available IPv4/6 address. string The underlying name of the adapter. On *nix, this will typically be "eth0", "wlan0", etc. number The prefix length Retrieves information about local adapters on this

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Use the chrome.devtools.inspectedWindow API to interact with the inspected window: obtain the tab ID for the inspected page, evaluate the code in the context of the inspected window, reload the page, or obtain the list of resources within the page.

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Use the system.cpu API to query CPU metadata. string The architecture name of the processors. string[] A set of feature codes indicating some of the processor's capabilities. The currently supported codes are "mmx", "sse", "sse2", "sse3", "ssse3",

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Use the chrome.history API to interact with the browser's record of visited pages. You can add, remove, and query for URLs in the browser's history. To override the history page with your own version, see Override Pages. To interact with the user's

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The chrome.system.memory API. number The amount of available capacity, in bytes. number The total amount of physical memory capacity, in bytes. Get physical memory information. function optional The callback parameter looks like: MemoryInfo

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Use the chrome.sockets.udp API to send and receive data over the network using UDP connections. This API supersedes the UDP functionality previously found in the "socket" API. The following keys must be declared in the manifest to use this API.

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Use the chrome.hid API to interact with connected HID devices. This API provides access to HID operations from within the context of an app. Using this API, apps can function as drivers for hardware devices. Errors generated by this API are reported

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Use the chrome.fileSystemProvider API to create file systems, that can be accessible from the file manager on Chrome OS. You must declare the "fileSystemProvider" permission and section in the extension manifest to use the File System Provider API.

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Use the chrome.devtools.recorder API to customize the Recorder panel in DevTools. devtools.recorder API is a preview feature that allows you to extend the Recorder panel in Chrome DevTools. See DevTools APIs summary for general introduction to using

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Use the chrome.fileSystem API to create, read, navigate, and write to the user's local file system. With this API, Chrome Apps can read and write to a user-selected location. For example, a text editor app can use the API to read and write local

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Use the chrome.contextMenus API to add items to Google Chrome's context menu. You can choose what types of objects your context menu additions apply to, such as images, hyperlinks, and pages. You must declare the "contextMenus" permission in your

Article

Use the chrome.browser API to interact with the Chrome browser associated with the current application and Chrome profile. string The URL to navigate to when the new tab is initially opened. Opens a new tab in a browser window associated with the

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Use the chrome.sockets.tcp API to send and receive data over the network using TCP connections. This API supersedes the TCP functionality previously found in the chrome.socket API. The following keys must be declared in the manifest to use this API.

Article

Use the chrome.usb API to interact with connected USB devices. This API provides access to USB operations from within the context of an app. Using this API, apps can function as drivers for hardware devices. Errors generated by this API are reported

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A guide to considerations when implementing speculation rules, particularly for more complex sites.

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Learn about the new capabilities for declarative behavior on buttons.

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scheduler.yield() is a new API for ergonomically splitting up long tasks and getting prioritized continuation of execution.

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The Chrome team responds to concerns from the community.

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Discover how eBay improved login success by 10% using Digital Asset Links for seamless credential sharing. Learn to implement secure, cross-platform authentication and enhance user experience.

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Helping you build, grow and innovate on the web.

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Samples for Chrome Extensions are available on GitHub.

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Warning: Starting in version 57, Chrome will no longer allow external web content (including embedded frames and scripts) inside sandboxed pages. Please use a webview instead. Defines an collection of app or extension pages that are to be served in a

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How to programmatically create, update, and publish items in the Chrome Web Store.

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Though Chrome Apps use the web platform, some web features have been disabled or else are used in a different way. Mainly this is to avoid security issues and to improve programming practices. Below is a summary of the disabled features of the web

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In connection with the Google Chrome Web Store, Google may make certain Chrome Web Store applications available in Google's Play for Education site. If You or Your organization is interested in participating, please verify that the

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One to four dot-separated integers identifying the version of this extension. A couple of rules apply to the integers: they must be between 0 and 65535, inclusive, and non-zero integers can't start with 0. For example, 99999 and 032 are both invalid.

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One or more mappings from MIME types to the Native Client module that handles each type. For example, the bold code in the following snippet registers a Native Client module as the content handler for the OpenOffice spreadsheet MIME type. The value

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Unlike the local and sync storage areas, the managed storage area requires its structure to be declared as JSON Schema and is strictly validated by Chrome. This schema must be stored in a file indicated by the "managed_schema" property of the

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This reference describes the methods and resource representation available for the Chrome Web Store Publish API. Each resource type has one or more data representations and one or more methods. See Using the Chrome Web Store Publish API for a guide

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The version of Chrome that your extension, app, or theme requires, if any. The format for this string is the same as for the version field.

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This value can be used to control the unique ID of an extension, app, or theme when it is loaded during development. To get a suitable key value, first install your extension from a.crx file (you may need to upload your extension or package it

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A plain text string (no HTML or other formatting; no more than 132 characters) that describes the extension. The description should be suitable for both the browser's extension management UI and the Chrome Web Store. You can specify locale-specific

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Whether the app or extension is expected to work offline. When Chrome detects that it is offline, apps with this field set to true will be highlighted on the New Tab page. As of Chrome 35, apps are assumed to be offline enabled and the default value

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RouteHandlerCallbackOptions StreamSource | Promise&lt; StreamSource &gt; Response ReadableStream BodyInit Takes multiple source Promises, each of which could resolve to a Response, a ReadableStream, or a BodyInit. Returns an object exposing a

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Every app has a JSON -formatted manifest file, named manifest.json, that provides important information. The following code shows the supported manifest fields for Apps, with links to the page that discusses each field.

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The externally_connectable manifest property declares which extensions, apps, and web pages can connect to your app via runtime.connect and runtime.sendMessage. For a tutorial on message passing see cross-extension and app messaging and sending

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Extension policies

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Technologies required by the app or extension. Hosting sites such as the Chrome Web Store may use this list to dissuade users from installing apps or extensions that will not work on their computer. Supported requirements currently include "3D" and

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TODO

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Specifies the subdirectory of _locales that contains the default strings for this extension. This field is required in extensions that have a _locales directory; it must be absent in extensions that have no _locales directory. For details, see

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One integer specifying the version of the manifest file format your package requires. As of Chrome 18, developers should specify 2 (without quotes) to use the format as described by this document: Consider manifest version 1 deprecated as of Chrome

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The name and short_name manifest properties are short, plain text strings that identify the app. You can specify locale-specific strings for both fields; see Internationalization for details. The name (maximum of 45 characters) is the primary

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One or more icons that represent the extension, app, or theme. You should always provide a 128x128 icon; it's used during installation and by the Chrome Web Store. Extensions should also provide a 48x48 icon, which is used in the extensions

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An overview of Custom Tab features and their browser availability.

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Discover what's coming to Chrome with the latest beta.

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Chrome Web Store An online marketplace where users can browse for extensions and themes. Publish your extension there and make it accessible to the world. dashboard Developer Dashboard Publish your extension and manage your store items. local_mall

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ChromeDriver is a standalone server that implements the W3C WebDriver standard.

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Chrome 134 is rolling out now! It includes light-dismiss functionality for dialogs, and plenty more to discover.

Release notes

Customizable select, dialog light dismiss, and more.

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Discover how Document Picture-in-Picture enhanced an online learning experience.

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Learn how to develop Chrome extensions.

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You can now stop the review process for an item that's pending review.

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How to cancel a review in the Chrome Web Store.

Index

AI on Chrome Welcome to the next era of the web with AI. See how AI can make it easier for developers to build powerful experiences on the web. Reimagine what's possible with Gemini Nano in Chrome. Built-in AI We're bringing Gemini Nano, the most

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Use the chrome.contentSettings API to change settings that control whether websites can use features such as cookies, JavaScript, and plugins. More generally speaking, content settings allow you to customize Chrome's behavior on a per-site basis

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Use the chrome.contentSettings API to change settings that control whether websites can use features such as cookies, JavaScript, and plugins. More generally speaking, content settings allow you to customize Chrome's behavior on a per-site basis

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This permission triggers a warning. Use the chrome.bookmarks API to create, organize, and otherwise manipulate bookmarks. Also see Override Pages, which you can use to create a custom Bookmark Manager page. You must declare the "bookmarks" permission

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Use the chrome.bookmarks API to create, organize, and otherwise manipulate bookmarks. Also see Override Pages, which you can use to create a custom Bookmark Manager page. You must declare the "bookmarks" permission in the extension manifest to use

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There's a special Chrome-internal page to see details on prompts to Gemini Nano. This guide explains how make use of it for debugging.

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Chrome on Android is going edge-to-edge from Chrome 135.

Article

Build edge-to-edge web experiences

Article

Use the 'Privacy and security' panel to inspect and control third-party cookies and check HTTPS protection.

Blog

Advance network analysis with Chrome DevTools.

Blog

Discover the new mode for popover that simplifies tooltips and other floating elements.

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Improve machine-learning workloads with subgroups, shader compilation time improvements on D3D12, remove float filterable texture types support as blendable, and more.

Case study

Learn how scroll-driven and scroll-triggered animations enhance storytelling articles

Index

Learn about Chrome's privacy and security features.

Article

Use the chrome.app.runtime API to manage the app lifecycle. The app runtime manages app installation, controls the event page, and can shut down the app at anytime. any optional Optional developer specified data that the app to be embedded can use

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Use the userScripts API to execute user scripts in the User Scripts context. To use the User Scripts API, chrome.userScripts, add the "userScripts" permission to your manifest.json and "host_permissions" for sites you want to run scripts on. A user

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Use the chrome.printing API to send print jobs to printers installed on Chromebook. All chrome.printing methods and events require you to declare the "printing" permission in the extension manifest. For example: The examples below demonstrate using

Article

Use the chrome.sessions API to query and restore tabs and windows from a browsing session. string The name of the foreign device. Session [] A list of open window sessions for the foreign device, sorted from most recently to least recently modified

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Use the chrome.printing API to send print jobs to printers installed on Chromebook. All chrome.printing methods and events require you to declare the "printing" permission in the extension manifest. For example: The examples below demonstrate using

Article

Use the chrome.sessions API to query and restore tabs and windows from a browsing session. string The name of the foreign device. Session [] A list of open window sessions for the foreign device, sorted from most recently to least recently modified

Index

Learn how to develop extensions with AI

Index

Discover Chrome Chrome 134, Beta Chrome 133 Chrome 132 Chrome 131 Chrome 130 Chrome 129 Chrome 128 Chrome 127 Chrome 126 Chrome 125 Chrome 124 Chrome 123 Chrome 122 Chrome 121 Chrome 120 Chrome 119 New in Chrome DevTools DevTools Tips Engineering

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Privacy and security panel, calibrated CPU throttling, first- and third-party highlighting in Performance, new insights, and more.

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Use the chrome.i18n infrastructure to implement internationalization across your whole app or extension. If an extension has a /_locales directory, the manifest must define "default_locale". You need to put all of its user-visible strings into a file

Blog

The Edge team added support for respecting the Windows ClearType Tuner values in Chromium directly, resulting in better text rendering in Chromium-based browsers on Windows.

Case study

Learn about how Google Search used the Speculation Rules API to anonymously prefetch search results to improve user experience

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Use the chrome.storage API to store, retrieve, and track changes to user data. The Storage API provides an extension-specific way to persist user data and state. It's similar to the web platform's storage APIs ( IndexedDB, and Storage ), but was

Article

Use the chrome.storage API to store, retrieve, and track changes to user data. To use the storage API, declare the "storage" permission in the extension manifest. For example: The Storage API provides an extension-specific way to persist user data

Article

In this guide, learn how to use BigQuery to write queries against the CrUX dataset to extract insightful results about the state of user experiences on the web.

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Technical documentation on CrUX tools.

Article

Receive support for the Chrome User Experience Report (CrUX).

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Details on the latest changes to the CrUX dataset.

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Learn about the change to the Chrome User Experience Report (CrUX changes) in the February 2025 release including LCP image subparts, LCP resource types, and RTT.

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Learn how to construct requests to and parse responses from the CrUX API.

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Learn how the CrUX dataset on BigQuery is structured.

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Learn how to query the previous six months of historical CrUX trends using the CrUX History API.

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Technical documentation on CrUX dimensions.

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Technical documentation on CrUX metrics.

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Code samples, guides, and API reference you need for whatever you're building.

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This page documents how to start using ChromeDriver for testing your website on desktop (Windows/Mac/Linux). You can also read Getting Started with Android or Getting Started with ChromeOS. ChromeDriver is a separate executable that Selenium

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Chrome allows web apps playing media to automatically enter picture-in-picture.

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Discover the latest features coming to Chrome.

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Use the chrome.enterprise.platformKeys API to generate keys and install certificates for these keys. The certificates will be managed by the platform and can be used for TLS authentication, network access or by other extension through

Article

Use the chrome.enterprise.platformKeys API to generate keys and install certificates for these keys. The certificates will be managed by the platform and can be used for TLS authentication, network access or by other extension through

Release notes

CSS advanced attr(), text-box-trim, scroll-state container queries, and more.

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Chrome 133 is rolling out now! There's some exciting new CSS features and plenty more to discover.

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Tabbed application mode allows Progressive Web App developers to add a tabbed document interface to their standalone PWAs.

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How to use specialized Auth Tab in your Android app

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How to use Ephemeral Custom Tabs in your Android app

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How to use App Specific History in your Android app

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Introducing app specific history for Chrome Custom Tabs for Android

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Improve web-based authentication with Auth Tab for Android

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Use the chrome.permissions API to request declared optional permissions at run time rather than install time, so users understand why the permissions are needed and grant only those that are necessary. Permission warnings exist to describe the

Article

Use the chrome.runtime API to retrieve the service worker, return details about the manifest, and listen for and respond to events in the extension lifecycle. You can also use this API to convert the relative path of URLs to fully-qualified URLs. The

Article

Use the chrome.permissions API to request declared optional permissions at run time rather than install time, so users understand why the permissions are needed and grant only those that are necessary. Permission warnings exist to describe the

Blog

Persistent AI chat history, better navigation, ignore listing, and stack traces in Performance, new 'What's new' panel, and more.

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Additional unorm8x4-bgra and 1-component vertex formats, allow unknown limits to be requested with undefined value, WGSL alignment rules changes, WGSL performance gains with discard, and much more.

Blog

An overview of the recent changes in Chrome Extensions, plus exciting upcoming extensions features developers can look forward to.

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This guide introduces best practices for session management with the Prompt API.

Index

What's New in Chrome Discover the latest updates in Chrome from our documentation and blog. New content and significant updates to documentation. article How LLMs stream responses New documentation to learn how streaming data works in AI, for the

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We're announcing a series of policy updates designed to provide clarity and consistency across our platform.

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Discover how to detect WebAuthn capabilities with `getClientCapabilities()` and tailor authentication workflows for your users.

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Understand what streaming is and how it works with AI and LLMs.

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Use these frontend best practices to display streamed responses from Gemini with APIs that support streaming, such as the Prompt API.

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The built-in Translator API lets you translate arbitrary content from a source to a target language. Participate in the origin trial to take the API for a spin.

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From Chrome 133, eligible CPU-intensive background tabs will be frozen when Energy Saver mode is active.

Index

DevTools Tips

Index

Improve the way you include images, video, and more on your websites and web apps.

Blog

Chrome on iOS 17 or later can now create, sync and authenticate with passkeys in Google Password Manager (GPM). This makes passkeys on GPM available everywhere Chrome is.

Blog

Like container queries; but for stuck, snapped, and overflowing queries.

Blog

You can now use attr() with any CSS property–including custom properties–and it can parse values into data types other than strings.

Blog

Learn about the latest features shipping in Chrome.

Blog

Learn about fun and exciting use-cases of the new AI assistance panel in DevTools

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Chrome 132 is rolling out now! The Dialog element gets a ToggleEvent, support for element level video sharing, and the File System Access API supports Android and WebViews.

Blog

Take back space from above and below your text content; achieve optical balance.

Release notes

ToggleEvent for dialog, support for element level video sharing, and the File System Access API supports Android and WebViews, and more.

Article

Use the chrome.tabs API to interact with the browser's tab system. You can use this API to create, modify, and rearrange tabs in the browser. The Tabs API not only offers features for manipulating and managing tabs, but can also detect the language

Article

Use the chrome.tabs API to interact with the browser's tab system. You can use this API to create, modify, and rearrange tabs in the browser. The Tabs API not only offers features for manipulating and managing tabs, but can also detect the language

Index

Learn how Chrome works, participate in origin trials, and build with Chrome everywhere.

Index

See what's included in Chrome's latest stable and beta releases.

Blog

Discover the winning apps and extensions from the Built-in AI Challenge, where we invited you to reimagine what's possible with Gemini Nano in Chrome.

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The Element Capture API is a performant and robust way for transforming a capture of the current tab into a capture of a DOM subtree.

Blog

The merger of the Web Vitals extension and DevTools is complete and support for the extension has ended.

Article

Use the chrome.ttsEngine API to implement a text-to-speech(TTS) engine using an extension. If your extension registers using this API, it will receive events containing an utterance to be spoken and other parameters when any extension or Chrome App

Article

Use the appview tag to embed other Chrome Apps within your Chrome App. (see Usage ). object Optional developer specified data that the app to be embedded can use when making an embedding decision. string The ID of the app that sent the embedding

Article

Use the chrome.ttsEngine API to implement a text-to-speech(TTS) engine using an extension. If your extension registers using this API, it will receive events containing an utterance to be spoken and other parameters when any extension or Chrome App

Article

Use the chrome.cookies API to query and modify cookies, and to be notified when they change. To use the cookies API, declare the "cookies" permission in your manifest along with host permissions for any hosts whose cookies you want to access. For

Article

Use the chrome.cookies API to query and modify cookies, and to be notified when they change. To use the cookies API, you must declare the "cookies" permission in your manifest, along with host permissions for any hosts whose cookies you want to

Article

Learn more about mitigating clickjacking attacks.

Blog

Texture view usage, 32-bit float textures blending, GPUDevice adapterInfo attribute, configuring canvas context with invalid format throw JavaScript error, filtering sampler restrictions on textures, extended subgroups experimentation, improving developer experience, experimental support for 16-bit normalized texture formats, and more.

Index

Find out how to use Chrome's capabilities to build rich and engaging web experiences.

Article

Recent changes to the Chrome extensions platform, documentation, and policy

Article

All ChromeOS test images have ChromeDriver binary installed in /usr/local/chromedriver/. The binary is updated to the same version of Chrome in that test image. That is, you always are using the latest build of ChromeDriver. If your test expects to

Article

The WebView component is based on the Chromium open source project.

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Chrome allows users to emulate Chrome on a mobile device from the desktop version of Chrome, by enabling the device mode with Chrome DevTools. This feature speeds up web development, allows developers to quickly test how a website renders in a mobile

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For earlier versions of Chrome, here are the versions of ChromeDriver that support it. For more information on selecting the right version of ChromeDriver, see the Version Selection page. Supports Chrome version 114 For more details, see the release

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At this time, ChromeDriver only supports systems that have a US keyboard configured. When ChromeDriver detects this state, it logs the following: Users without a US keyboard may experience lost keys during sendKeys or TypeElement commands. As a

Article

To diagnose and fix ChromeDriver crashes, you have a few options. This is only for ChromeDriver crashes, which is not the same as Chrome crashing or closing. On Windows, you may see something like this: Create a repro case that ChromeDriver

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The latest binaries for ChromeDriver are packaged as zip files for various host platforms. Earlier versions of ChromeDriver can be found in Downloads. ChromeDriver supports running tests on Chrome browser (version 30+) and WebView-based apps starting

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Some WebDriver commands, such as resizing the browser window, require a Chrome extension to be loaded into the browser. ChromeDriver normally loads this "automation extension" every time it launches a new Chrome session. However ChromeDriver can be

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ChromeDriver is a powerful tool, and it can cause harm when in the wrong hands. While using ChromeDriver, follow these suggestions:

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This often happens when running ChromeDriver or Chrome using a special test harness (perhaps an IDE) or continuous build system (such as Jenkins). Try launching the same Chrome binary that your test uses from a normal user command prompt. Confirm

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WebDriver BiDi Backend Design [Microsoft] Async Command Processing for WebDriver in Chromium Browser Tools- and Testing WG, Day 2, TPAC 2019, Fukuoka Browser Tools- and Testing WG, Day 1, TPAC 2019, Fukuoka

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To enable verbose logging, pass --verbose to the ChromeDriver server. You can also pass --log-path to cause the log to be written to a file instead of stderr. If you don't start the ChromeDriver server directly yourself, you need to pass the switch

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Capabilities are options that you can use to customize and configure a ChromeDriver session.

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ChromeDriver supports performance logging, from which you can get events of domains "Timeline", "Network", and "Page", as well as trace data for specified trace categories. Performance logging is NOT enabled by default. So when creating a new

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ChromeDriver Canary has the latest new ChromeDriver features. New binaries are built and made available multiple times a day. Be aware, it's designed for developers and early adopters and can sometimes break down completely. Starting with M115 the

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Use the chrome.pageCapture API to save a tab as MHTML. MHTML is a standard format supported by most browsers. It encapsulates in a single file a page and all its resources (CSS files, images..). Note that for security reasons a MHTML file can only be

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Use the chrome.pageCapture API to save a tab as MHTML. MHTML is a standard format supported by most browsers. It encapsulates in a single file a page and all its resources (CSS files, images..). Note that for security reasons a MHTML file can only be

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A Chrome study shows that autofill users fill forms faster, with lower abandonment rates.

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Deprecated technology to create experiences that had more access to the underlying operating system.

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Learn how to use latest Payment APIs in Chrome

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Find resources on topics such as typography, color, and layout.

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Automate web performance audits with Lighthouse

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A Node.js library providing a high-level API to control headless Chrome or Chromium

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Learn WebGPU with guides, demos and latest news

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Optimize the performance of your web applications with Chrome's performance tools.

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Learn about Chrome's features for developing web apps on Android.

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Digital accessibility, commonly abbreviated a11y, is about designing and building websites and web apps that disabled people can interact with in a meaningful and equivalent way. This course is created for beginner and advanced web developers. You

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Learn about Chrome's identity features, such as Web Authentication.

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Thank you for the time you shared with us, providing feedback, reviewing details and helping shape standards.

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Learn about changes to Chrome that affect developers.

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Check out Chrome for Developers' 2024 year-end roundup of the latest web features, capabilities, and tools.

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Use the chrome.action API to control the extension's icon in the Google Chrome toolbar. The following keys must be declared in the manifest to use this API. To use the chrome.action API, specify a "manifest_version" of 3 and include the "action" key

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Learn the requirements to start building features and applications with built-in AI.

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The chrome.extension API has utilities that can be used by any extension page. It includes support for exchanging messages between an extension and its content scripts or between extensions, as described in detail in Message Passing. The type of

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Use the chrome.declarativeContent API to take actions depending on the content of a page, without requiring permission to read the page's content. The Declarative Content API allows you to enable your extension's action depending on the URL of a web

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Use this API to expose certificates to the platform which can use these certificates for TLS authentications. Typical usage of this API to expose client certificates to ChromeOS follows these steps: The actual sequence of steps can be different. For

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Note: this API is deprecated. Check out the declarativeNetRequest API instead. Use the chrome.declarativeWebRequest API to intercept, block, or modify requests in-flight. It is significantly faster than the chrome.webRequest API because you can

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Use this API to expose certificates to the platform which can use these certificates for TLS authentications. Typical usage of this API to expose client certificates to ChromeOS follows these steps: The actual sequence of steps can be different. For

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The complete reference to all APIs made available to Chrome Extensions. This includes APIs for the deprecated Chrome Apps platform as well as APIs still in beta and dev.

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Use the chrome.declarativeContent API to take actions depending on the content of a page, without requiring permission to read the page's content. The Declarative Content API lets you enable your extension's action depending on the URL of a web page,

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The chrome.extension API has utilities that can be used by any extension page. It includes support for exchanging messages between an extension and its content scripts or between extensions, as described in detail in Message Passing. The type of

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Use the commands API to add keyboard shortcuts that trigger actions in your extension, for example, an action to open the browser action or send a command to the extension. The following keys must be declared in the manifest to use this API. The

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The Language Detector API offers built-in language discovery on the web, in the browser.

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Use the offscreen API to create and manage offscreen documents. To use the Offscreen API, declare the "offscreen" permission in the extension manifest. For example: Service workers don't have DOM access, and many websites have content security

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Use the system.display API to query display metadata. An enum to tell if the display is detected and used by the system. The display is considered 'inactive', if it is not detected by the system (maybe disconnected, or considered disconnected due to

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Use the system.display API to query display metadata. An enum to tell if the display is detected and used by the system. The display is considered 'inactive', if it is not detected by the system (maybe disconnected, or considered disconnected due to

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Use the Allocation timeline tool to find objects that aren't being properly garbage collected, and continue to retain memory.

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How to pass the "Avoid non-composited animations" Lighthouse audit.

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This section describes common terms used in memory analysis, and is applicable to a variety of memory profiling tools for different languages.

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Record and analyze a performance trace with DevTools.

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Join the Chrome DevRel team and a skateboarding Chrome Dino on a journey through the latest CSS launched for Chrome and the web platform in 2024.

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Debug network requests, source files, and performance traces with Gemini, view AI chat history, and more.

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How to view and edit extension storage with the Extension Storage panel.

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An easier and more secure replacement for passwords.

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Discover the infinite possibilities of the Prompt API in Chrome Extensions.

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Learn more about configuring a strong HTTP Strict Transport Security (HSTS) policy

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The experimental Performance Insights Panel will be removed in January 2025, replaced by new insights within the Performance panel itself.

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Discover and explore latest news about and use cases for AI assistance

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Browsers, and you, as a developer, can help users enter data faster, and avoid re-entering data. Autofill is a feature that allows browsers to automatically fill in form fields with users' saved information, such as name, address, and payments

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Learn about new AI and rendering features discussed at the latest GPU for the Web working group meeting.

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We've selected ViddyScribe for the Gemini API Developer Competition web award. They exemplified how Gemini can help make videos on the web more accessible by generating audio descriptions for any video.

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How to prepare your extension for the new extensions menu.

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Discover the Translator API to empower global customer support.

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Learn how to make performance traces more understandable with the new annotations features in DevTools

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Understand performance profiles - with the help of AI

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Understand how a website works with the help of AI

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Learn about the latest features shipping in Chrome.

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Live translate text in the browser using local AI models. Now, users can contribute in their first language.

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Built-in AI is the latest offering for bringing powerful models to users, while protecting sensitive data and improving latency.

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Understand your website's network traffic - with the help of AI

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Introducing Signal API for passkeys on Chrome desktop

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Understand your website resources - with the help of AI

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The chrome.networking.onc API is used for configuring network connections (Cellular, Ethernet, VPN or WiFi). This API is available in auto-launched Chrome OS kiosk sessions. Network connection configurations are specified following Open Network

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Chrome 131 is rolling out now! More CSS styling for the details element, easier print layout with page margin boxes, and there is plenty more.

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Participate in the origin trial to help users distill lengthy articles, complex documents, or even lively chat conversations into concise and insightful summaries.

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CSS Highlight Inheritance is changing, more CSS styling for the details element, easier print layout with page margin boxes, and more.

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The WebAuthn Signal API allows a relying party to signal the state of existing credentials to the passkey provider, so that the passkeys are consistent with credentials on the server.

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Participate in the Prompt API for Chrome Extensions origin trial and access Gemini Nano in Chrome.

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Distill lengthy articles, complex documents, or even lively chat conversations into concise and insightful summaries.

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Test a new or experimental web platform feature. Give feedback to the web standards community on the feature's usability, practicality, and effectiveness, before the feature is made available to all users.

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Clip distances in WGSL, GPUCanvasContext getConfiguration(), point and line primitives must not have depth bias, inclusive scan built-in functions for subgroups, experimental support for multi-draw indirect, shader module compilation option strict math, remove GPUAdapter requestAdapterInfo(), and more.

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Learn how to use Chrome and DevTools to find memory issues that affect page performance, including memory leaks, memory bloat, and frequent garbage collections.

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You can now set the display type and also style the container for the part that expands and collapses using the new ::details-content pseudo-element.

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Gain deep insight into memory allocation, investigate low level memory issues, and manage garbage collection.

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Seamless credential sharing lets you securely signal to password managers that your users can sign in using the same credentials across your Android app and website.

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A list of ways you can customize Chrome DevTools: Change theme, placement, panel order, language, and more.

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Toggle various overlays and speed up DOM tree navigation with badges.

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Monitor live Core Web Vitals metrics in the Performance panel.

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Debug CSS with Gemini, annotate findings and get insights in the Performance panel, spot excessive layout shifts and non-composited animations, and more.

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The Handwriting Recognition API allows web applications to use advanced handwriting recognition services to recognize text from handwritten input in real time.

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