Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The Sec-CH-UA-Platform user agent client hint request header provides the platform or operating system on which the user agent is running. For example: "Windows" or "Android".
Sec-CH-UA-Platform is a low entropy hint. Unless blocked by a user agent permission policy, it is sent by default (without the server opting in by sending Accept-CH).
| Header type | Request header, Client hint |
|---|---|
| Forbidden header name | yes |