What is my browser?

Your browser, operating system, screen, language, time zone, processor cores and graphics renderer — all readable by any website you visit, with no permission prompt. Seen together, these values often single out one browser among millions, which is how fingerprinting identifies you with cookies blocked and no account signed in.

Runs entirely in your browser

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About this tool

The moment you open a web page, your browser volunteers a long list of details about your device — no permission prompt, no click required. This tool reads back the same values any site can: your browser and version, operating system, screen size and colour depth, language, time zone, number of processor cores, and the graphics renderer your device reports. Individually these seem harmless; seen together they often single out one browser among millions.

That combination is the basis of browser fingerprinting. Unlike a cookie, a fingerprint needs nothing stored on your device — it is reconstructed from the characteristics your browser exposes every visit — which is why it can follow you with cookies blocked, in private-browsing mode, and without any account signed in. The more unusual your particular mix of values, the more identifiable you are.

Everything here runs locally in your browser; none of these values is sent to our server. Use it to understand your own exposure, to see what changes when you switch browsers or enable anti-fingerprinting features, and to sanity-check privacy tools that claim to normalise or spoof these signals.

Frequently asked questions

What is browser fingerprinting?: It is a way of identifying and tracking a browser using the combination of characteristics it exposes — screen size, fonts, time zone, graphics renderer and more. Because it relies on properties rather than stored data, it works even when cookies are blocked.
Can websites see all of this without asking me?: Yes. The values shown here are exposed by standard web APIs that require no permission prompt. That is exactly why the combination is so useful for tracking and so worth understanding.
Does private or incognito mode hide this information?: Not really. Private modes stop history and cookies from being saved, but most of the fingerprinting signals shown here are still exposed, so a site can often still recognise the browser.
How can I reduce my fingerprint?: Browsers with built-in anti-fingerprinting (which normalise or randomise these values) and mainstream, unmodified setups both help — an unusual, heavily customised configuration can ironically stand out more. Re-run this tool after changes to see the effect.
Is any of this data sent to your server?: No. This tool reads the values in your browser and displays them to you locally. Nothing about your device is transmitted to us.

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