IPv6 Leak Test

What this result means

IPv6 connectivity is normal. This check reports what it observes without treating ordinary IPv6 use as a privacy leak.

How this check works

The browser first reads the IP family observed by the normal site request, then asks a separate IPv6-only endpoint to report the address it observed. A returned IPv6 address confirms that this browser reached that endpoint over IPv6.

Seeing IPv6 is not automatically a leak. IPv6 becomes relevant when you expect a VPN to block or tunnel it. This test cannot prove tunnel routing, identify a VPN, or establish that a provider misconfigured your connection.

Using a VPN? A single test cannot conclusively determine an IPv6 leak because it does not know your pre-VPN IPv6 identity or the VPN's intended IPv6 behavior.