Your browser, OS & device
Unknown on Unknown
Desktop
Browser Unknown
Operating system Unknown
Device type Desktop
Your full user agent string
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected]) What is a user agent?
A user agent is a string your browser sends to every website you visit. It identifies the browser name and version, the operating system, and sometimes the rendering engine and device type. Websites use it to decide which version of a page to send, or whether a feature is supported.
Why does my user agent matter?
- Compatibility: sites may show different layouts for mobile vs. desktop based on this string.
- Analytics: site owners use it to see what browsers and devices their visitors use.
- Fingerprinting: combined with other signals, it can help identify a returning visitor even without cookies.
Note: some browsers (like Chrome) now send a simplified, "frozen" user agent
string for privacy, with detailed version info available only via separate APIs.
Want to check more about your connection? See your public IP overview, ISP and ASN, or whether you're using a VPN.