Browser privacy check
This is what any website can read from your browser without asking. Nothing here is sent anywhere unless you press the button at the bottom.
Network check (optional)
This contacts two outside services: api.ipify.org to read your public IP address, and a Google STUN server to see whether your browser leaks an IP through WebRTC. They will see your IP address. Skip it if you do not want that.
About the browser privacy check
Every website you visit can read many details from your browser without asking: the browser and system version, language, screen size, time zone and graphics hardware. Combined, they can recognise your device even without cookies. This is called browser fingerprinting.
This page shows those details so you can see what is exposed. The canvas code is a short hash of a hidden test picture. If it differs in another browser or a private window, sites see you as a different device.
The optional network check reads your public IP address and tests whether WebRTC reveals an address that a VPN should hide. It contacts api.ipify.org and a Google STUN server, and only runs when you press the button.