User-Agent Parser
Developer ToolsHow to use this User-Agent parser
- Paste any User-Agent string, or click "Use my browser's UA".
- See the browser, engine, OS, and device type broken down instantly.
- Useful for debugging analytics, log files, or browser-specific bugs.
What is a User-Agent string?
It's a text header sent by every browser with each request, identifying the browser, rendering engine, operating system, and device, servers use it to serve appropriate content or for analytics.
Why does the User-Agent string mention multiple browsers?
For historical compatibility, most browsers include tokens from older browsers they're compatible with (like "Mozilla" and "Safari" appearing even in Chrome), a quirk dating back to the "browser wars" that never went away.
Can User-Agent strings be faked?
Yes, easily, any browser's developer tools or extensions can override it, so User-Agent detection should never be relied on for security purposes, only for optional feature adjustments.