The Privacy Sandbox

The Privacy Sandbox is a series of proposals to satisfy cross-site use cases without third-party cookies or other tracking mechanisms.

  • What is the Privacy Sandbox? #
  • Get started #
    • Feedback
      Where and how to provide feedback for Privacy Sandbox proposals throughout the development process.
    • Privacy Sandbox glossary
      Short explanations of key concepts.
    • Is it ready yet?
      Implementation status for Privacy Sandbox APIs.
    • FAQs
      Frequently asked questions about the Privacy Sandbox proposals
  • Strengthen privacy boundaries #
  • Prevent covert tracking #
    • User-Agent reduction
      The reduced User-Agent shares a limited set of data to improve user privacy and reduce opportunities for tracking. With User-Agent Client Hints, developers can request more details in a managed and audited process.
    • User-Agent reduction snippets
      Test your own sites and services against the reduced Chrome user-agent format by using a regular expression to transform the current Chrome user-agent to the reduced format.
    • Gnatcatcher
    • Privacy Budget
  • Show relevant content #
    • The Topics API
      A proposal for a mechanism to enable interest-based advertising without having to resort to tracking the sites a user visits.
    • Topics API: experiment and participate
      A proposal for a mechanism to enable interest-based advertising without having to resort to tracking the sites a user visits.
    • FLEDGE API
      FLEDGE is a Privacy Sandbox proposal to serve remarketing and custom audience use cases, designed so it cannot be used by third parties to track user browsing behavior across sites. The API enables on-device auctions by the browser, to choose relevant ads from websites the user has previously visited.
    • FLEDGE: experiment and participate
      FLEDGE is a Privacy Sandbox proposal to serve remarketing and custom audience use cases, designed so it cannot be used by third parties to track user browsing behavior across sites. The API enables on-device auctions by the browser, to choose relevant ads from websites the user has previously visited.
  • Measure digital ads #
  • Fight spam and fraud #
    • Trust Tokens
      An API to convey a limited amount of information from one browsing context to another (for example, across sites) to help combat fraud, without passive tracking.
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