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User-Agent Parser - Parse Browser UA, OS & Device Model Online

Parse User-Agent strings to accurately identify web browser name/version, operating system, layout engine, and mobile/desktop device type.

This tool runs in your browser.
Your result will appear here.

How to use

  1. 01Paste a User-Agent string into the box, or click "Use current browser User-Agent".
  2. 02The parser extracts browser name/version, operating system, layout engine, and device type.
  3. 03Review segmented device properties and copy parsed hardware tokens in one click.

FAQ

What is a User-Agent and why do web servers evaluate it?

A User-Agent is an HTTP request header identifying browser and OS details, helping servers serve mobile-responsive layouts.

Why do User-Agent strings contain multiple browser tokens?

Browser tokens reflect historical compatibility compromises, where emerging engines adopted legacy tokens to prevent websites from blocking them.

Does parsing user agent strings log my private device specs?

No. Parsing regex logic executes strictly within client-side JavaScript memory without transmitting telemetry.