User Agent Parser
Your browser sends this string to every website you visit.
What Your User Agent Reveals
Your user agent string tells every website you visit your browser name and version, operating system, device type, and rendering engine. Websites use this to serve compatible content and track visitors.
User agent is one of many signals used for browser fingerprinting. Combined with screen resolution, installed fonts, and hardware info, it can uniquely identify your browser. Check your full fingerprint with our Browser Fingerprint Test.
Modern browsers are moving away from detailed user agents. Chrome's User-Agent Client Hints (UA-CH) replaces the monolithic string with structured, opt-in data — giving users more control over what they share.
FAQ
What is a user agent?
A user agent is a string your browser sends with every HTTP request. It tells websites your browser type, version, operating system, and device. Websites use this to serve compatible content.
Can I change my user agent?
Yes. Browser extensions or developer tools let you spoof your user agent. However, user agent is just one of many signals used for browser fingerprinting.