What is My Browser?

How it actually works

A local environment reader that asks your browser about itself and prints the answers; it makes no network request and reveals nothing to any server. It parses navigator.userAgent to name the browser and operating system, and reports the raw user-agent string, screen resolution, the current window size, colour depth and device pixel ratio, the languages, the timezone, cookie support, local-storage support and online status.

Most values come straight from standard interfaces - screen width and height, window inner width and height, devicePixelRatio, navigator.language and hardwareConcurrency - so they reflect the machine and window you are actually using. Browser and OS names are inferred by matching patterns in the user-agent string, which is why a heavily customised agent can be mislabelled.

Everything is read on-device from information your browser already hands to every site, so it is an honest mirror of your client, not a security verdict.

What that means for your results

Because there is no upload and no external call, the page is a safe way to see what a normal website can already learn about you. The values are reported as the browser provides them, and the cookie and storage rows are real feature checks rather than guesses.

Where it falls short — honestly

The user-agent is deliberately unreliable for naming: privacy modes and hardened browsers send a trimmed or generic agent, so the detected browser and version can be wrong even though the raw string shown is correct. Some fields are deprecated or implemented differently across engines, and this tool cannot see your full privacy posture - it lists signals, not a security score.

A real end-to-end workflow

Open it when a page looks wrong to check window size, pixel ratio, timezone or language, or to copy your user-agent into a bug report. To see the public IP a server sees instead, use My IP Address, and to test a single URL response use HTTP Status Checker.