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Extend the web

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Explore a variety of ways to add interactions to your extension.
Explore ways to customize and react to the browser.
Explore ways to change and modify web pages.

Extensions in action

Load these sample extensions on your local computer.
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This sample demonstrates the use of the Action API which changes the icon, icon badge, hover text or popup page depending on the user's choice or action.
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A user script is can be created by users or downloaded from a script repository. This sample allows you to inject files and arbitrary code added in an options page.
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This sample demonstrates how you can inject JavaScript into web pages using the Scripting API.
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This sample demonstrates how to create a side panel that opens when the user clicks a button on a page or opens a context menu.
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Documentation

Everything you need to know about Chrome Extensions.
Build your first extension.
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Learn how Chrome Extensions work and what they can do.
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Learn to solve specific use cases in Chrome Extensions.
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Reference documentation for Extensions APIs, manifest keys, and permissions.
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Extensions posts

Read the most recent Chrome Extensions blog posts

Support and feedback

Get help developing your extension, and help us make Chrome Extensions better.
Get answers to questions not covered by the documentation.
Report extension bugs or problems with documentation.
Submit a request for a feature that you believe could improve the extension platform.
Check whether a bug or feature request has already been reported.