WebRTC/DNS Leak Test

What Is a WebRTC Leak?

WebRTC (Web Real-Time Communication) is a technology built into modern browsers for audio/video calls and P2P data transfer. The problem is that WebRTC can reveal your real IP address even when using a proxy or VPN.

When the browser establishes a WebRTC connection, it queries a STUN server to determine its public IP. This request can bypass proxy settings, and the website will see your real IP alongside the proxy IP.

How Does Our Test Work?

The tool performs two parallel checks. First, it determines your server IP (the one websites see) through our API. Second, it uses the JavaScript WebRTC API (RTCPeerConnection + STUN server) to discover IPs available through WebRTC. Then it compares the results.

If the detected IPs match — there's no leak. If WebRTC reveals an additional IP different from the server one — a leak is detected.

How to Protect Against WebRTC Leak?

In Chrome/Edge: install the WebRTC Leak Prevent extension. In Firefox: open about:config and set media.peerconnection.enabled = false. Or use quality proxies with WebRTC blocking support.

FAQ

Is a WebRTC leak dangerous? Yes, if you use proxies for anonymity. Websites can determine your real IP despite the proxy.

Are all browsers affected? Most modern browsers support WebRTC: Chrome, Firefox, Edge, Opera. Safari has limited support.