Zase
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User Agent Parser

Paste a user agent string and see the browser, OS and device inside it.

Get it in Chrome

Also available in the Chrome extension Every Zase tool also lives in the free Developer Toolkit by Zase extension: fully offline, in a window or the side panel, one keyboard shortcut away.

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About this User Agent Parser

The User Agent Parser breaks a user agent string into its browser, operating system and device parts. Paste the string from your server logs or analytics and find out what actually visited, including whether it looks like a bot or crawler.

How to use the User Agent Parser

  1. Paste the full user agent string into the input.
  2. Read the parsed browser, version, OS and device details.
  3. Use the result to reproduce the visitor environment or filter your logs.

Good to know

  • Most strings claim to be Mozilla and several browsers at once; the parser reports the engine that matters.
  • Handy when a bug report says only: it broke on my phone.
  • Bot and crawler detection helps explain strange traffic in server logs.

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