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Sec-CH-UA-Model header

files/en-us/web/http/reference/headers/sec-ch-ua-model/index.md

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{{SeeCompatTable}}{{SecureContext_Header}}

The HTTP Sec-CH-UA-Model {{Glossary("request header")}} is a user agent client hint which indicates the device model on which the browser is running.

<table class="properties"> <tbody> <tr> <th scope="row">Header type</th> <td> {{Glossary("Request header")}}, <a href="/en-US/docs/Web/HTTP/Guides/Client_hints">Client hint</a> </td> </tr> <tr> <th scope="row">{{Glossary("Forbidden request header")}}</th> <td>Yes (<code>Sec-</code> prefix)</td> </tr> </tbody> </table>

Syntax

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

Directives

  • <device-version>
    • : A string containing the device version. For example "Pixel 3".

Examples

Using Sec-CH-UA-Model

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

http
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:

http
GET /my/page HTTP/1.1
Host: example.site

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"

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also