Updated at: Jun 25, 2024
Every time your web browser opens a web page, it sends a "request" for that page. Part of that request includes a series of "headers".
Here is a list of the 28 headers your browser sent when requesting this page.
| ACCEPT | text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7 |
|---|---|
| ACCEPT-ENCODING | gzip, deflate, br, zstd |
| ACCEPT-LANGUAGE | en-US,en;q=0.9 |
| CONTENT-LENGTH | |
| CONTENT-TYPE | |
| DEVICE-MEMORY | 8 |
| DOWNLINK | 1.75 |
| DPR | 1 |
| ECT | 4g |
| HOST | www.whatismybrowser.com |
| PRIORITY | u=0, i |
| RTT | 100 |
| SEC-CH-PREFERS-COLOR-SCHEME | light |
| SEC-CH-PREFERS-REDUCED-MOTION | no-preference |
| SEC-CH-UA | " Not A;Brand";v="99", "Chromium";v="126", "Google Chrome";v="126" |
| SEC-CH-UA-ARCH | "x86" |
| SEC-CH-UA-FULL-VERSION | "126.0.0.0" |
| SEC-CH-UA-MOBILE | ?0 |
| SEC-CH-UA-MODEL | "" |
| SEC-CH-UA-PLATFORM | "Windows" |
| SEC-CH-UA-PLATFORM-VERSION | "10.0" |
| SEC-FETCH-DEST | document |
| SEC-FETCH-MODE | navigate |
| SEC-FETCH-SITE | none |
| SEC-FETCH-USER | ?1 |
| UPGRADE-INSECURE-REQUESTS | 1 |
| USER-AGENT | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 |
| VIEWPORT-WIDTH | 1284 |
These headers may vary from site to site (in particular the HOST and COOKIE headers!) depending on your settings.
If you're curious and want to learn more about HTTP (a protocol which the World Wide Web relies on) and HTTP Headers, please read the Wikipedia pages on Hypertext Transfer Protocol and List of HTTP header fields.
Client Hints are the new approach to identifying web browsers, built to eventually replace user agents. We're following the development and switch to using them closely. We've also built a tool to detect client hints that your web browser is sending.
If you have any more questions, use the contact form and we'll answer it and add your question here.