Web features explorer

User agent client hints

Limited availability

The Sec-CH-UA HTTP request header and the navigator.userAgentData API expose browser and platform information used to vary responses and application logic. User agent client hints are similar to user agent strings but more privacy-preserving and safer to parse.

Browser support

  • Chrome 90 Released on 2021-04-13
  • Chrome Android 90 Released on 2021-04-13
  • Edge 90 Released on 2021-04-15
  • Firefox Not supported Position: neutral Bugs: 935216
  • Firefox for Android Not supported Position: neutral Bugs: 935216
  • Safari Not supported Position: blocked (concerns: interoperability, privacy)
  • Safari on iOS Not supported Position: blocked (concerns: interoperability, privacy)
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MDN documentation

Specifications

Usage (according to Chrome Platform Status)

~74.836% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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