WebRTC Leak Test: Is Your VPN Leaking Your IP?

WebRTC (Web Real-Time Communication) is the technology that lets browsers talk to each other directly for video calls, voice chat, and file sharing. Zoom, Google Meet, and Discord all rely on it, which is why every major browser ships with it switched on.

To connect two peers directly, WebRTC asks a STUN server one simple question: what is my real IP address? That request can slip outside the VPN tunnel, and the answer becomes readable by any website that asks the browser for it. That shortcut is the leak. No permission prompt, no visible sign it happened.