JoliTools

User Agent Parser

Decode any browser user agent string

Paste a user agent string, or press the button above to use your own.

Parsing happens entirely in your browser. Nothing is sent or stored anywhere. User agents can be spoofed, so results are a best-effort guess.

About this tool

User agent strings are dense, cryptic, and essential for debugging. Paste one in to get a clean breakdown: browser and version, operating system, and device type.

The one-click Use my UA button parses your own browser instantly. Everything happens locally, your UA is never transmitted.

How to use the user agent parser

  1. 1Paste a user agent string, or click Use my UA.
  2. 2See browser, version, OS and device type.
  3. 3Copy the parsed summary.

Frequently asked questions

A string your browser sends with every request identifying itself, like Chrome 120 on Windows 11.

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