What is my user agent?
Every request your browser makes includes a User-Agent string that describes the browser, version and operating system. Here's exactly what yours sends.
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
What your user agent says
- Browser
- Unknown
- Version
- —
- Operating system
- Unknown
- Device type
- Desktop
Client details
Read from your browser with JavaScript — never sent to or stored by this server.
- Platform
- —
- Languages
- —
- Screen
- —
- Viewport
- —
- Time zone
- —
- Cookies
- Do Not Track
- —
- Touch
- —
- CPU cores
- —
- Device memory
- —
What is a user agent?
A user agent is any software that acts on your behalf to access the web — most often a browser. When it connects to a website, it sends a User-Agent header: a short line of text identifying the browser, its version, the rendering engine and your operating system. Servers use it to serve the right layout, enable features, or gather anonymous analytics.
User-Agent strings are famously messy. For historical reasons almost every browser still begins its string with Mozilla/5.0, and browsers like Edge, Opera and Brave deliberately include Chrome for compatibility. That's why the parsed values above are a best-effort guess, not a guarantee — the string can be changed or spoofed at will.
Your user agent is one of many signals a site can combine into a fingerprint. On its own it isn't unique, but together with your screen size, time zone, fonts and IP address it can help identify a browser. If privacy matters to you, see how to hide your IP address and what your IP really reveals.
→ Check your IP address · See your HTTP headers · More tools