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-Model user agent client hint request header indicates the device model on which the browser is running.

Header type Request header, Client hint
Forbidden header name yes


Sec-CH-UA-Model: <device-version>



A string containing the device version. For example "Pixel 3".


A server requests the Sec-CH-UA-Model header by including the Accept-CH in a response to any request from the client, using the name of the desired header as a token:

HTTP/1.1 200 OK
Accept-CH: Sec-CH-UA-Model

The client may choose to provide the hint, and add the Sec-CH-UA-Model header to subsequent requests. For example, on mobile phone the client might add the header as shown:

GET /GET /my/page HTTP/1.1

Sec-CH-UA: " Not A;Brand";v="99", "Chromium";v="96", "Google Chrome";v="96"
Sec-CH-UA-Mobile: ?1
Sec-CH-UA-Platform: "Android"
Sec-CH-UA-Bitness: "64"
Sec-CH-UA-Model: "Pixel 3 XL"


User-Agent Client Hints
# sec-ch-ua-model

Browser compatibility

BCD tables only load in the browser

See also