What Is My Browser
See your browser, OS, and version at a glance, along with screen size and language settings.
Detecting…
- Language
- —
- Cookies enabled
- No
- Online
- Yes
- Viewport size
- — × —
- Screen size
- — × —
Read directly from your browser, nothing is sent to a server. Browser/OS/version detection is a best-effort guess from the user agent string, not a guarantee — some browsers send a generic user agent for privacy.
Need the opposite? What Is My User Agent
What is What Is My Browser?
A quick dashboard of what your browser reports about itself: browser name and version, operating system, language, viewport and screen size, cookie and online status. Useful for quickly checking your setup when reporting a bug or comparing environments.
How to Use This Tool
- 1
Open This Page: Visit this page in the browser you want to check.
- 2
Read the Dashboard: Browser, OS, language, viewport, screen size, and connection status all appear automatically.
How It Works
The browser and OS names/versions shown here come from pattern-matching your browser's `navigator.userAgent` string, a self-reported label your browser sends, not something this page independently verifies. The other rows (language, cookies enabled, online status, viewport size, screen size) come from separate, more reliable browser APIs (`navigator.language`, `navigator.cookieEnabled`, `navigator.onLine`, `window.innerWidth`/`innerHeight`, `window.screen`) that don't depend on parsing a string. Everything is read and computed locally in your browser. Nothing on this page is sent to a server.
Why the Browser/OS Guess Might Be Wrong
The browser and OS fields are labeled "best guess" for a reason: they depend on matching known tokens (like Chrome/XX or Mac OS X) inside the user agent string, and that string isn't guaranteed to be accurate. Chrome's User-Agent Reduction effort and Safari's longstanding UA freezing both mean modern browsers increasingly send a generalized or version-frozen string rather than a precise one. Some browsers also intentionally impersonate another browser's UA for site compatibility, and in-app browsers embedded inside social apps often report a generic or misleading string. The other fields on this page (viewport, screen size, cookies, online status) don't have this problem. They're read directly, not guessed from text.
Common Use Cases
Pasting a quick environment snapshot into a bug report so whoever picks it up knows the browser, OS, and screen size involved without asking. Comparing your setup against a support article's requirements, or sanity-checking that cookies/online status are what you expect before debugging a login or offline-mode issue.
Frequently Asked Questions
Common questions about What Is My Browser.