What this page already knows about you
No cookie. No login. No permission prompt. You opened a page and it learned all of this — as every site you visit does. The difference is that this one shows you, and keeps none of it.
Everything here was readable the instant this page loaded, without asking you for anything. Most sites read a good share of it and send it onward to build a profile that follows you between sites — no cookie required, which is why clearing cookies does not make you anonymous. This page reads it, prints it, and throws it away. Watch the uploads counter in the top bar while you scroll: it stays at 0.
Questions people ask
Is any of this sent to a server?
No. Every value is read by JavaScript in your browser and printed back to you. Nothing is transmitted, logged or stored. The uploads counter in the top bar stays at 0 the whole time, and you can watch the same thing in your dev-tools Network tab.
Did I agree to any of this?
No — and that is the point. Everything shown here is readable by any website the instant you open it, with no cookie banner, no account and no permission prompt. There is nothing to consent to, because nothing here is technically "personal data collection" until someone writes it down.
What is a browser fingerprint?
A combination of ordinary details — screen size, GPU model, time zone, installed fonts, language — that is individually harmless but collectively rare enough to identify your browser across different sites, with no cookie involved at all. It is why deleting your cookies does not make you anonymous.
How do I reduce my fingerprint?
Use a browser that actively resists fingerprinting — Tor Browser is the strongest, and Firefox has a resist-fingerprinting mode; Safari and Brave also blunt several of these signals. Blocking scripts by default helps most of all. Perfect anonymity is genuinely hard, but the common signals can be dulled.
Why does a tools site show me this?
Because every tool here runs in your browser and uploads nothing, and this is the clearest way we can show the difference between what a website is able to take and what it chooses to take.
How this works & why it’s private
Each value comes from an ordinary web API — navigator, screen, matchMedia, Intl, WebGL's debug-renderer extension, and the Network Information and Storage APIs. The font list is inferred by rendering a string in each candidate font and measuring whether its width differs from a fallback, because no browser will simply list your fonts. The canvas and audio signatures come from rendering the same content everywhere and observing that different GPUs and audio stacks produce very slightly different output. All of it runs in this tab; the fingerprint hash is computed locally with crypto.subtle. Nothing here asks for a permission — no location, camera, microphone or clipboard read — and nothing is sent anywhere. Open your dev-tools Network tab and confirm it.