See exactly what your browser reports: browser name and version, OS, device type, screen, language and more — detected instantly. This free what is my browser tool needs no signup and runs entirely in your browser.
What is the What Is My Browser?
What is my browser is a detector that tells you exactly what your browser reports about itself: the browser name and version, operating system, device type, screen resolution, viewport size, language, cookie support and more — all shown as clear cards the moment the page loads.
Every website you visit sees this information; it’s how pages adapt to your phone or desktop, pick a language, and decide which features to enable. This free tool simply surfaces it back to you in plain English, parsing the cryptic user-agent string into ‘Chrome 131 on Windows 11’ style facts, and adding live readings like your current viewport size, pixel ratio, touch support and online status.
It runs entirely in your browser with no signup: detection uses only built-in browser APIs, nothing is sent anywhere, and nothing is stored. The most common use is practical — answering support’s ‘what browser are you on?’ — followed by developers and testers documenting environments, and the simply curious discovering what their browser broadcasts to the world.
How to use the What Is My Browser
- Open the page — your browser, OS, device type and screen details are detected automatically.
- Read the cards: browser name and version, operating system, device type, screen resolution, language and more.
- Press Re-detect if you changed something (like resizing the window or toggling a VPN) and want fresh readings.
- Copy any detail with one click when a support form asks for your browser or OS version.
What Is My Browser use cases
Answering support questions
When support asks ‘which browser and version are you using?’, one glance gives the exact answer instead of digging through settings menus.
Developers debugging issues
Developers check OS, viewport, touch support and language to reproduce bugs exactly as a user experienced them.
QA and compatibility testing
QA testers record the browser matrix for each test pass — browser, OS and screen size in one copyable place.
Understanding your digital fingerprint
Curious users see exactly what information their browser broadcasts to every website they visit.
Tips
- Support agents ask for browser + version first — this page gives you the exact string to paste into a ticket.
- Your user agent string is the raw identifier sites see; the parsed cards translate it into plain English.
- Screen resolution and viewport differ on zoomed pages — reset zoom to 100% for the true numbers.
- If a site misbehaves only in one browser, these cards make an A/B comparison across browsers trivial.