WebRTC Leak Test (VPN Check)

Check whether WebRTC exposes your real or local IP address while using a VPN — see every ICE candidate your browser reveals.

How to use

1Connect to your VPN, then press Run test.
2If a public IP that isn't your VPN's appears, WebRTC is leaking — disable it or use your VPN's leak protection.

How it's calculated

The page opens a WebRTC connection to a public STUN server and lists the addresses your browser offers. Modern browsers hide local IPs behind random .local names.

Frequently asked questions

What is a WebRTC leak?

WebRTC (used for video calls) can reveal your real IP address to websites even when you're on a VPN.

How do I fix a leak?

Turn on your VPN's WebRTC leak protection, use a browser extension that limits WebRTC, or disable it in Firefox (media.peerconnection.enabled).

Does this test contact a server?

Only a public STUN server (Google's), which tells your browser its public address. Results aren't stored or sent to us.