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User-Agent Parser

Parse any user-agent string to detect browser, operating system, device type, and bot/crawler. Regex-based, instant, and 100% client-side.

Try these user-agent strings:

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Frequently Asked Questions

What is a user-agent string?

A user-agent string is a text header sent by your browser or HTTP client to identify itself to web servers. It typically includes the browser name and version, operating system, rendering engine, and device information.

Is the user-agent parser free?

Yes, completely free. No sign-up, no limits, no data uploads. All parsing is done client-side with regex patterns — your user-agent string never leaves your browser.

Does it detect bots and crawlers?

Yes. The parser recognizes over 60 bots, crawlers and scrapers — Googlebot, Bingbot, GPTBot, CCBot, AhrefsBot, SemrushBot, and many more. Bots are flagged clearly in the results.

How does the parse my own browser's UA?

Click 'Your Browser' and the tool reads `navigator.userAgent` to fill and parse your current browser's user-agent string. No manual copy-paste needed.