User Agent Parser

Parse user agent strings to identify browser, OS, and device information

Free
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Your Current User Agent

About User Agent Strings

What is a User Agent?

A User Agent string is a text identifier that web browsers send to websites, containing information about the browser, operating system, and device being used.

Common Uses

  • Browser detection and compatibility
  • Device-specific content delivery
  • Analytics and tracking
  • Security and bot detection

UA String Components

  • Browser: Chrome, Firefox, Safari, Edge, etc.
  • Version: Browser version number
  • OS: Windows, macOS, Linux, Android, iOS
  • Device: Desktop, mobile, tablet
  • Engine: Rendering engine (Blink, Gecko, WebKit)