Audit browser WebRTC connections with our free WebRTC Leak Test. Gather ICE candidate endpoints via STUN requests to verify if your private LAN or public ISP address is leaking past active VPN tunnels with 100% offline privacy.
The tool initializes an in-memory RTCPeerConnection on page load.
STUN requests retrieve local and public candidate IP interfaces.
Check the visual shield badge for 'Secure (No Leaks)' or exposure warnings.
Uses native browser WebRTC APIs (RTCPeerConnection) to capture live ICE candidate streams.
Extracts regex IP strings from ICE candidate payloads to expose internal LAN or VPN tunnel leaks.
All candidate evaluations run locally inside your browser DOM. No network endpoints are logged to external databases.
Web Real-Time Communication (WebRTC) relies on Interactive Connectivity Establishment (ICE) protocols to negotiate peer-to-peer audio and video channels across NAT firewalls.
During SDP offer creation, STUN servers resolve all available network interfaces. If your browser sends STUN queries outside your VPN tunnel, your ISP's true public IP address is returned in raw ICE candidate strings.
Modern privacy configurations recommend enforcing mDNS anonymization for local candidates or routing all WebRTC ICE candidate traffic through active proxy routing tables.