WebRTC Leak Test - Is Your Browser Leaking Your IP?

What is a WebRTC leak?

WebRTC (Web Real-Time Communication) is a browser technology that powers video calls, voice chat, and peer-to-peer file sharing without plugins. To establish a direct connection, your browser uses a process called ICE (Interactive Connectivity Establishment) that discovers every IP address it can reach you on - including your local LAN address and, via a STUN server, your public IP. A website can quietly read these candidates with JavaScript, which means it can learn your real IP even if you are browsing through a VPN or proxy.

Why does this matter behind a VPN?

A VPN routes your normal traffic through an encrypted tunnel so websites only see the VPN's exit IP. However, WebRTC can open its own connection that sidesteps the tunnel. If this test shows a public IP that does not match your VPN's exit IP, your browser is leaking your true location and your VPN is not protecting you as expected.

How to fix a WebRTC leak

• Use a VPN with WebRTC leak protection: Many reputable VPN clients block or rewrite WebRTC candidates automatically.
• Browser extensions: Privacy extensions such as uBlock Origin (in advanced mode) or dedicated “WebRTC leak prevent” add-ons can disable the leak.
• Firefox: Open about:config and set media.peerconnection.enabled to false to disable WebRTC entirely.
• Chrome / Edge: Use an extension to set the WebRTC IP-handling policy to “disable non-proxied UDP,” or rely on your VPN client.
• mDNS obfuscation: Modern Chromium browsers hide local IPs behind .local hostnames by default, which protects your LAN address.