HTTP Request Headers
Show the HTTP headers your browser sends to every website you visit.
These are the HTTP headers your browser sent with this page request. Every site you visit sees them before running any code — they carry your user agent, language preferences, and (in Chromium browsers) Client Hints about your platform.
| Accept | */* |
|---|---|
| Accept-Encoding | gzip, br, zstd, deflate |
| Host | corewebutilities.com |
| User-Agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
See more of your digital fingerprint
Headers are only part of the picture. The Browser Privacy Check reveals the signals JavaScript can read, and What Is My IP shows your network identity.
Frequently asked questions
What are HTTP request headers?
Request headers are small name-and-value lines your browser sends with every page request. They describe what you accept, your language preferences, your user agent and more, before any JavaScript on the page runs.
Which headers reveal information about me?
User-Agent exposes your browser and operating system, Accept-Language reveals your language and region, and in Chromium browsers the Sec-CH (Client Hints) headers can disclose your platform and device. Referer shows the page you came from.
What is the Referer header?
The Referer header tells a site which page linked you to it. It can leak your browsing path, so modern browsers trim or withhold it in many cases via the Referrer-Policy set by each site.
Why do I not see my cookies here?
This tool deliberately omits the Cookie header and proxy-added headers so it focuses on what your browser itself reveals. Cookies are covered by your browser's own privacy settings.
Are these headers stored?
No. They are read from your current request and shown back to you; nothing is logged or saved.