📖 What is this tool?
User-Agent Parser decodes browser user-agent strings to identify the browser name, version, operating system, device type and rendering engine. Paste any user-agent string to instantly understand what browser and device sent it.
💡 Example
Input
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 Chrome/120.0.0.0
Output
Browser: Google Chrome 120
OS: Windows 10/11
Device: Desktop
Engine: WebKit/Blink
🛠️ Common Use Cases
- Debug browser compatibility issues
- Analyze server logs for browser distribution
- Identify bot and crawler traffic
- Test user-agent detection in web apps
- Verify mobile device detection
❓ Frequently Asked Questions
What is a user-agent string? ▾
A user-agent is a string sent by browsers in every HTTP request identifying the browser, OS and device. Servers use it for analytics, compatibility detection and sometimes content adaptation.
Can user-agent strings be faked? ▾
Yes — any browser or HTTP client can send any user-agent string. Never rely on user-agent alone for security decisions. It's useful for analytics and compatibility hints but not authentication.
How do I find my browser's user-agent? ▾
Open browser DevTools (F12) → Network tab → click any request → look for the User-Agent header under Request Headers. Or type navigator.userAgent in the browser console.
🔒
Your data stays private. All processing happens entirely in your browser. Nothing is ever sent to our servers. You can use this tool offline after the page loads.