A request headers is an HTTP header that the client sends to the server.
HTTP request headers list | Browser Headers Viewer
| Type | Non-standard |
| Subype | Unofficial Client Hints |
| Related headers | Sec-Ch-Ua-Arch, Sec-Ch-Ua-Bitness, Sec-Ch-Ua-Form-Factors, Sec-Ch-Ua-Full-Version, Sec-Ch-Ua-Full-Version-List, Sec-Ch-Ua-Mobile, Sec-Ch-Ua-Model, Sec-Ch-Ua-Platform, Sec-Ch-Ua-Platform-Version, Sec-Ch-Ua-Wow64 |
| Last seen | 2025-12-05 07:11:58 |
| Link | https://wicg.github.io/ua-client-hints/ |
| Note | Non-standard Client Hints promoted by Google. |
| Syntax | Sec-CH-UA: <sh-list> |
Example header value:"Opera";v="75", " Not;A Brand";v="99", "Chromium";v="89" |
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