Privacy tools

IP leak test: is your VPN really hiding your address?

A VPN can hide your main address and still let it slip through WebRTC, IPv6 or a stray HTTP header. Run this while the VPN is on and we check each of those doors, plus how unique your browser fingerprint is.

216.73.216.55

United States, Columbus Amazon Web Services

Vectors tested

WebRTC
IPv6
HTTP Headers
Fingerprint

Extended uses more STUN servers.

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For DNS-specific testing, use the DNS Leak Test.

What does this test check?

WebRTC Leak

WebRTC is a browser API for real-time communication. It uses STUN servers to discover IP addresses, including your real IP, which can bypass VPN tunnels. This test creates a peer connection and checks what IPs are exposed.

IPv6 Leak

Many VPNs tunnel only IPv4 traffic. If your system has an IPv6 address and the VPN doesn't handle it, your IPv6 address leaks on every connection to dual-stack servers.

HTTP Header Leak

Proxies and improperly configured VPNs can inject headers like X-Forwarded-For into your requests, revealing your real IP to the destination server.

Browser Fingerprint

Even without an IP leak, websites can identify you by combining browser properties - screen resolution, fonts, canvas rendering, timezone and more. This is harder to hide than an IP address.

The leak test checks WebRTC, DNS, IPv6 and headers and flags any channel exposing the real IP