See the full user agent string your browser sends to every website — parsed into browser, version, OS, engine and device type. Paste any user agent string to analyse it.
🌐 Your Browser's User Agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
A user agent string is sent by your browser with every HTTP request. It identifies your browser type, version, operating system and device. Websites use it to serve the right content, analytics tools use it to measure browser market share, and security systems use it to detect bots.
Can websites use my user agent to track me?
Yes. Your user agent is part of your browser fingerprint. Combined with your screen resolution, time zone, fonts and other signals, it helps websites identify returning visitors even without cookies. Tools like Firefox with Resist Fingerprinting or the Tor Browser normalise the user agent to reduce this.
How do I change my user agent?
In Chrome DevTools (F12 → Network → Network conditions → User agent). Firefox has similar DevTools options. Browser extensions like User-Agent Switcher also work. VPNs do not change your user agent — only browser settings or extensions can.
What is the difference between user agent and browser fingerprint?
A user agent is a single string. A browser fingerprint is a combination of dozens of signals — user agent, screen resolution, installed fonts, canvas rendering, WebGL data, time zone, language and more. The fingerprint is much harder to spoof than just changing the user agent.