What Is My Browser
See your browser, operating system, screen resolution and other device details — read entirely in your browser, nothing is sent anywhere.
🔒 Fully offline — no network request is made, not even to our own servers.
How It Works
1. Open This Page
Your details are detected and shown automatically, no button to press.
2. Read Every Detail
Browser, OS, screen size, language, timezone and more, in one clear grid.
3. Copy the User Agent
One click copies your full User-Agent string for bug reports or support tickets.
Why Use This Tool?
🔒 100% Local
No network request is made at all — everything is read directly from your browser.
⚡ Instant
Results appear the moment the page loads, faster than any tool that needs a server.
🐛 Built for Bug Reports
Copy your exact browser, OS, and screen details when reporting an issue to support.
📱 Works on Any Device
Desktop, tablet, or phone — detects the device type automatically.
Frequently Asked Questions
No. This tool makes no network requests at all — every value shown is read directly from your browser's own APIs and displayed locally. Nothing is transmitted or stored.
"Screen Resolution" reflects your monitor's full resolution, while "Viewport Size" reflects the actual browser window size available for the page — these differ if your browser isn't maximized or if you're using display scaling.
Support teams and developers often ask for it to diagnose browser-specific bugs, and some websites or tools ask you to paste it when troubleshooting compatibility issues.