Browser & Device Info
What your browser reveals about you.
Browser & Device Info shows what this page can see about your setup: user agent, screen and window size, pixel ratio, time zone, language, CPU cores, memory, GPU renderer and supported features. It is a diagnostic tool and, deliberately, a demonstration of how much a page learns without asking.
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Runs entirely on your device. No file or text you enter here is uploaded. How to verify it.
How to use Browser & Device Info
- Read the detected properties, grouped by category.
- Note which of them are unusual for your device.
- Copy the whole report for a bug report.
Questions about Browser & Device Info
Is this information sent anywhere?
No. Everything is read in the page and displayed. Nothing is logged or transmitted — which is the opposite of what a fingerprinting script does with the same values.
What is browser fingerprinting?
Combining values like these — fonts, GPU renderer, time zone, screen size, language — into an identifier that tracks you without cookies. No single value identifies you; the combination often does, because unusual combinations are rare.
Why does my user agent claim to be several browsers?
Historical accident. User agent strings accumulated compatibility tokens for decades, which is why Chrome claims Mozilla, AppleWebKit, KHTML and Safari all at once. Browsers are now freezing and reducing these strings.
Does it show my IP address?
No, and it cannot. An IP address is not readable from inside the browser — it only becomes visible to a server you send a request to, and this page sends none. Any site that shows you your IP is reporting what its own server saw.
Can I make my browser less identifiable?
To a degree. Fewer extensions, a common window size, and a browser that normalises these values — Safari, Firefox with resist-fingerprinting enabled, or the Tor Browser — all narrow the gap. Perfect anonymity is not realistic; the aim is to resemble many other people rather than to disappear.
Is Browser & Device Info really free, with no limits?
Yes. There is no account, no daily cap, no file-size tier and no watermark, because there is no server cost to recover. The site is funded by clearly disclosed partner recommendations on the Partners page, never by metering the tools.
Are my files or text uploaded when I use Browser & Device Info?
No. Everything is processed by JavaScript running in your browser, on your device. You can verify it: open your browser's developer tools, switch to the Network tab, and use the tool. You will see no request carrying your data — because there is nowhere for it to go.