About User-Agent Parser

User-Agent Parser breaks a browser's User-Agent string into readable parts: the browser and its major version, the engine, the operating system, and a device-type guess.

It is a compact heuristic, not a full database, and it runs in your browser.

How to use it

  1. Paste a User-Agent string, or use the one from your own browser.
  2. Read the parsed fields and the one-line summary.
  3. Try other strings to compare.

Common questions

Why is my Windows version shown as 10 or 11?

Recent Windows sends the same version token for 10 and 11, so they cannot be told apart from the User-Agent alone.

How accurate is the device type?

It is a guess from keywords like Mobile and Tablet. Most cases are right, but spoofed or unusual strings can fool it.

Does it identify every browser?

It knows the common ones. Niche browsers often report themselves as Chrome or Safari, so that is what you will see.

Does anything leave my browser?

No. The tool runs entirely on this page.