User Agent Parser
Detect browser, operating system, engine, and device details from any user agent string.
What is a User Agent String?
A user agent string is a line of text your browser sends to websites that includes details about your browser, operating system, and device. It's useful for debugging, analytics, content optimization, and security checks. Each browser and device has a slightly different user agent structure.
Why Use a User Agent Parser?
- Identify browser and OS compatibility issues
- Debug devices or platforms used by visitors
- Understand user distribution for analytics
- Spot suspicious or spoofed user agents
- Test user agent-based redirection or content delivery
- Forensics or fraud detection in cybersecurity
How to Use This Tool
Paste any user agent string into the input field or use the one automatically detected from your browser. Click the Parse User Agent button and the tool will extract and show structured data such as:
- Browser name and version
- Operating system and version
- Device type (mobile, tablet, desktop)
- Rendering engine (e.g., Blink, WebKit, Gecko)
- Platform/architecture (32-bit, 64-bit, ARM)
How to Get Your User Agent Manually
You can find your user agent manually by following these steps based on your browser:
- Google Chrome: Press Ctrl + Shift + I to open DevTools → Go to Network tab → Reload the page → Click any request → Check Headers → Find
User-Agent. - Firefox: Press F12 or Ctrl + Shift + I → Click the Network tab → Reload page → Click any request → Under Headers, look for
User-Agent. - Safari: Enable Developer mode in preferences → Go to Develop menu → Select Show Web Inspector → Use the Network tab.
- Edge: Same as Chrome → Open DevTools → Go to Network tab → Inspect request headers.
- Command Line: Use
curl -I https://example.comorwgetwith flags to view the user agent sent.
FAQs
What information can I get from a user agent?
You can extract browser name/version, OS name/version, device type, platform, and rendering engine.
Can user agents be spoofed?
Yes. Advanced users and bots can fake user agents, so it should not be the sole basis for security decisions.
Why do websites read user agents?
Websites use user agents to optimize experience based on device/browser type, for analytics, and for fraud prevention.
Can I change my user agent?
Yes. Most modern browsers allow user agent override through developer tools or browser extensions.
Is this tool accurate?
Yes. It uses a reliable client-side library (UAParser.js) that is regularly updated and widely used by developers.
Disclaimer
This tool provides general information for development and diagnostics. While accurate for most common browsers/devices, spoofed or custom user agents may return misleading data. ToolNexIn does not store any user agent strings or parsed results.