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.
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
|Header type||Request header, Client hint|
|Forbidden header name||yes|
One of the following strings:
Sec-CH-UA-Platform is a low entropy hint it is typically sent in all requests.
A browser running on a macOS computer might add the following header to all requests.
|User-Agent Client Hints |
BCD tables only load in the browser