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User Agent Parser
Parse and explain browser User Agent strings
User Agent String
Enter a User Agent string to parse, or click "Use My Browser" to analyze your current browser.
About User Agent Parser
What is User Agent Parser?
Decode complex User Agent strings into readable components. Identify the browser name and version, operating system, device type (desktop/mobile/tablet), and rendering engine.
Features & Benefits
- Browser identification
- OS and version detection
- Device type classification
- Rendering engine info
- Bot/crawler detection
- Your current UA shown
Frequently Asked Questions
- What is a User Agent string?
- A string sent by browsers to identify themselves. It contains browser name, version, OS, and device info. Used for compatibility checks.
- Why are User Agent strings so complex?
- Historical compatibility. Browsers include other browser names to avoid being served degraded content. This led to bloated UA strings.
- Is User Agent reliable for detection?
- Partially. It can be spoofed and doesn't always reflect actual capabilities. Use feature detection when possible instead of UA sniffing.
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This tool runs entirely in your browser. Your files and data never leave your device and are not uploaded to any server.