What Is My User Agent

Find your browser's user agent string instantly. Check its reported browser, OS and device, then copy your UA with one click.

Your user agent
Browser Signals
Not part of your UA string, but visible to websites alongside it.
Touch
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Languages
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Timezone
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Screen
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Cookies
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Analyze this UA for bots & anomalies →
Bot detection, anomaly scoring, and token-level breakdown
Full browser diagnostics →
IP address, WebRTC leak detection, screen info, hardware, speaker test
FAQ
What is a user agent string?

A user agent string is a short text identifier your browser includes in every HTTP request. It tells the server which browser, browser version, rendering engine, operating system, and device type you are using. Servers use it to serve compatible content or detect automation.

How do websites use user-agent strings?

Websites use UA strings to serve browser-specific code (like polyfills or CSS prefixes), redirect mobile users to a mobile layout, detect bots and scrapers, enforce platform-specific paywalls, and log traffic analytics by browser and OS. Security tools use UAs to fingerprint suspicious clients.

Can I change or fake my user agent?

Yes. Browser developer tools let you set a custom UA string under Network Conditions. Extensions like User-Agent Switcher do it per-tab. Some privacy browsers (Brave, Tor Browser) rotate or genericize the UA by default to reduce fingerprinting. Note that the UA alone is not sufficient for fingerprinting — sites pair it with browser signals like timezone, screen resolution, and canvas rendering.

How do I check my user agent on mobile?

Open any browser on your phone and visit this page — it reads your UA automatically. On Chrome for Android you can also find it at chrome://version. On Safari for iOS, UA access requires a tool like this one, since iOS does not expose it through a settings page.