Browser tool
User Agent Checker
See your raw user agent string, detected browser, device/browser signals, and selected HTTP headers your browser sends when loading a website.
What is a user agent?
A user agent is a text string your browser sends to websites. It usually includes compatibility labels, browser engine details, browser name/version, operating system hints, and device type hints.
Why headers matter for privacy
Request headers help websites deliver compatible pages, but they can also contribute to browser fingerprinting. Language, user agent, client hints, screen details, timezone, and graphics signals can all make a browser easier to recognise.
Useful next checks
After checking your user agent, run the browser fingerprint test, WebRTC leak test, and DNS leak test.
Frequently asked questions
Why does my Chrome user agent say Mozilla?
Most modern browsers include Mozilla/5.0 at the start of the user agent for historical website compatibility. The later Chrome, Edge, Firefox, or Safari token is the useful browser identifier.
Can websites see my full HTTP headers?
Websites can see request headers sent to them, such as user-agent, language, referrer, and client hints. This page returns a privacy-safe subset and intentionally excludes cookies and authorization headers.
Is device memory exact?
No. Browsers usually report device memory as a coarse estimate or capped bucket, not your exact installed RAM. That helps reduce fingerprinting precision.
Can I change my user agent?
Developers can override user agents in browser tools or extensions, but changing it can break websites and may make your browser fingerprint more unusual.