User Agent Finder
Instantly detect your browser, OS, device hardware, and network details with a deep system profile.
What Is a User Agent String?
Every browser sends a User Agent (UA) string to every website it visits as part of the HTTP request headers. This string identifies the browser, its version, the operating system, and sometimes the device type. Websites use this information to serve appropriate content — a mobile browser might receive a different layout, a specific browser might receive compatibility CSS, or an older engine might receive a fallback experience.
A typical Chrome on Windows User Agent looks like:Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36Despite what it says, this is Chrome — the "Mozilla/5.0" prefix is a historical artifact that all modern browsers include for compatibility reasons.
Why Developers Check Their User Agent
- Debugging browser-specific issues by confirming the exact browser version being used.
- Testing User Agent detection logic in web applications.
- Confirming that a browser spoofing or privacy extension is working correctly.
- Verifying mobile device detection for responsive design troubleshooting.
- Checking which rendering engine is being used (Blink, Gecko, WebKit).
User Agent and Privacy
The User Agent string is one of the data points used in browser fingerprinting — combining it with screen resolution, installed fonts, timezone, and other attributes creates a profile unique enough to identify users across sessions without cookies. Browsers like Firefox and Brave have introduced UA reduction features that return generic, less identifying strings to reduce fingerprint uniqueness.
Knowledge Base
A User Agent Finder is a diagnostic tool that reads your browser's User-Agent string and additional hardware APIs to generate a complete profile of your system. It reveals browser version, operating system, CPU cores, RAM, screen resolution, and network status.
- 1Open the tool - it automatically detects your system information instantly.
- 2Review your software details (Browser, OS, Device Type) in the left panel.
- 3Review your hardware and network details (CPU, RAM, Screen, Speed) in the right panel.
- 4Click 'Copy Full Report' to get a formatted text version for support tickets or debugging.
It goes far beyond just reading the UA string. It uses modern Browser APIs to detect actual hardware specs like CPU cores and RAM, and Network APIs to show your current connection speed, making it an ultimate debugging companion.
Why is the detected OS showing Windows 10/11?
Microsoft unified the User-Agent string for both Windows 10 and 11. Without extra client hints, browsers report both as Windows NT 10.0. For exact OS detection, modern Client Hints API is used, which our tool attempts to leverage.
Is my data being sent to a server?
No. All detection happens locally in your browser using standard JavaScript APIs (navigator, window). Nothing is sent externally, making it 100% private.
Why is Device Memory showing N/A?
The Device Memory API is only available in Chromium-based browsers (Chrome, Edge) and is not supported in Firefox or Safari for privacy reasons. In those browsers, it will display as N/A.