The What Is My Browser tool is a free online utility that detects and displays detailed information about your current web browser, operating system, screen resolution, language settings, IP address and other technical properties. This information is sent by your browser to every website you visit via the User-Agent string and request headers.

Understanding what information your browser broadcasts is important for privacy awareness, and this tool is also used by web developers and QA testers to verify browser detection functionality in their applications.

Information Detected

• Browser — name, version and rendering engine (Chrome 120, Firefox 121, Safari 17, etc.)
• Operating System — Windows 11, macOS Sonoma, Android 14, iOS 17, etc.
• Device type — desktop, tablet or mobile
• Screen resolution — width × height in pixels
• Browser language — your preferred language setting
• IP address — your public IP (see more with our My IP Address tool)
• Java/cookies/JavaScript — enabled or disabled

Developer Use Cases

• Test that browser detection logic in your application works correctly
• Debug browser-specific rendering or JavaScript issues
• Verify that User-Agent detection is functioning
• Check cookie and JavaScript availability for compatibility

No personal data is stored. Free, instant, no login required.