Developer Tools
User-Agent Parser
Parse a User-Agent string into browser, engine, OS and device.
Free foreverRuns in your browserNo sign-up
Browser
Chrome 120.0.0.0
Engine
Blink
Operating system
Windows 10 / 11
Device type
Desktop
Detection uses common patterns and is a best-effort guess; some browsers deliberately mask their User-Agent.
About the User-Agent Parser
A User-Agent string identifies the browser, engine, operating system and device making a request. The format is dense and hard to read at a glance.
This tool breaks it down into browser and version, rendering engine, operating system and device type, and can read your own browser's User-Agent with one click.
Parsing is a best-effort match done entirely in your browser.
Key features
- Detects browser and version
- Identifies engine, OS and device type
- One-click 'use my browser'
- Local, private parsing
How to use
- 1Paste a User-Agent string, or click Use my browser.
- 2Read the detected browser, engine, OS and device.
Examples
Chrome on Windows
Input:
Mozilla/5.0 (Windows NT 10.0...) Chrome/120Detects Chrome, the Blink engine, Windows 10/11 and a desktop device.
Frequently asked questions
- Why might detection be wrong?
- User-Agent strings are inconsistent and can be spoofed or frozen by the browser for privacy, so detection is a best-effort guess rather than a guarantee.
- What is the rendering engine?
- It is the core that draws web pages, such as Blink (Chrome, Edge), Gecko (Firefox) or WebKit (Safari).
- Is my User-Agent sent anywhere?
- No. Detection happens locally in your browser and nothing is uploaded.