Browser & Session Information
Some legacy properties (navigator.appCodeName, appName, product, javaEnabled()) are frozen or deprecated in current browsers and mostly return fixed, meaningless values — they're included below for reference but modern fingerprinting/detection relies on the newer fields shown first.
Frequently Asked Questions
What does "browser information" mean, and why would I check it?
It's the technical details your browser exposes to every website you visit: user agent, screen size, timezone, language, and more. Developers use it to debug cross-browser issues; anyone curious can use it to see exactly what a site can detect about their setup.
Why does my user agent string look so complicated?
Modern user agent strings carry decades of legacy compatibility tokens (like "Mozilla/5.0" and "like Gecko") that browsers kept for historical compatibility even though they no longer describe the actual browser accurately. That's also why several of the "Legacy" fields below return generic, frozen values.
Is this the same as a browser fingerprint that can track me?
Not by itself. A fingerprint combines many signals, such as screen size, fonts, and timezone, into a combination unique enough to identify a device across sites without cookies. Individually, most fields here are common enough not to identify you alone, but the "Modern" fields above are the ones fingerprinting scripts typically read.
What's the difference between screen resolution and viewport size?
Screen resolution is your monitor's or device's total pixel dimensions. Viewport size is how much of that is actually available to the browser window or tab you're using right now, which shrinks with sidebars, split-screen, browser zoom, or a smaller window.
Why do some fields show "(unsupported)" or "(unavailable)"?
Not every browser implements every API. Certain fields, like Client Hints or Device Memory, are Chromium-specific and won't populate in Safari or Firefox; that's expected and reflects real differences between browsers, not a bug.
Is any of this information sent anywhere or logged?
No. Everything on this page is read directly from your own browser's JavaScript APIs and displayed locally. Nothing is transmitted to or stored by our server.
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