A request headers is an HTTP header that the client sends to the server.
HTTP request headers list | Browser Headers Viewer
| Type | Standard |
| Subype | Client Hints |
| Related headers | Accept-CH, Downlink, Dpr, Sec-Ch-Device-Memory, Sec-Ch-Dpr, Sec-Ch-Prefers-Color-Scheme, Sec-Ch-Prefers-Reduced-Motion, Sec-Ch-Viewport-Height, Sec-Ch-Viewport-Width, Viewport-Width |
| Last seen | 2025-12-05 02:44:24 |
| Note | A boolean that indicates the user agent's preference for reduced data usage. |
| Syntax | Save-Data: <sd-token> |
Example header value:on |
|