How does this WebRTC test work?
The page asks your browser to prepare a peer-to-peer connection — exactly what a video-call site would do. During that step the browser gathers ICE candidates: the IP addresses your device could be reached on. We list every address it volunteers and compare them with the public IP your network requests come from. Nothing is sent to anyone else, and nothing is stored.
What result should I expect with a good VPN?
With a leak-safe VPN connected you should see only your VPN exit IP (the same as the
"public IP" row) or anonymized mDNS names like abc123.local — modern Chrome and
Firefox hide local addresses this way. Seeing a different public IP than the network one
means WebRTC is bypassing your tunnel.