Welcome
You didn't click anything, accept anything or type anything. Yet here is everything a website can learn about you in a few milliseconds. Combined, these details form a fingerprint that recognises you from one site to the next, even without cookies, and that "invisible" CAPTCHAs use to decide whether you are human.
This page is a plain file with no server: everything is computed in your browser, then forgotten when you close it.
Only your IP is seen by a geolocation service (freeipapi.com, falling back to ipapi.co
or ipwho.is).
A real website also sees, server side and even if you block JavaScript: your IP, the HTTP headers of every request and the fingerprint of your encrypted connection (TLS), widely used by anti-bot systems.
To shrink your fingerprint: a browser that standardises or scrambles these values (Tor Browser, Mullvad Browser,
Brave, Firefox with privacy.resistFingerprinting), a VPN for the IP, and refusing needless permissions.
Paradox: too many anti-tracking extensions often make your fingerprint more unique.