IP leak test
Runs in your browser · freeCompare the IP your requests use with what WebRTC and IPv6 reveal.
| IPv4 your web requests use | … |
| IPv6 your web requests use | … |
| Public IPs seen by WebRTC | … |
| Local addresses seen by WebRTC | … |
| What this shows | … |
Uses ipify and a public STUN server, called from your browser. Nothing is sent to NexLogin.
How to read the result
Your web requests leave through one IP: the proxy's or VPN's if you use one. Every other IP a site can discover should either match it or be hidden. Two things commonly break that:
- WebRTC asks STUN servers for your address over UDP. If the proxy only carries normal web traffic, the STUN reply shows your real IP.
- IPv6 may bypass a proxy or VPN that only handles IPv4, so the site sees your real IPv6 address.
For the full picture, also run the WebRTC leak test and the browser fingerprint test.
IP leak test FAQ
What is an IP leak?
An IP leak is when a site can see an IP address other than the one your proxy or VPN gives you. The usual paths are WebRTC, which can reach STUN servers outside the proxy, and IPv6 traffic that the proxy does not carry.
How does this test work?
It asks a public IP service (ipify) which IPv4 address and which IPv6 address your web requests come from, then asks WebRTC which addresses it can reach. An address that WebRTC reveals but your requests do not use is a leak. The test cannot tell whether an address belongs to your proxy or to you, so compare the addresses shown with your proxy's.
Is my IP sent to NexLogin?
No. The page calls ipify, a public IP lookup service, and a public STUN server directly from your browser. Nothing goes to NexLogin.
How do I fix an IP leak?
Route WebRTC through the proxy or turn it off, and either disable IPv6 or use a proxy that carries it. NexLogin handles WebRTC per browser profile, so each profile only shows its proxy's IP.
One IP per profile, and only that IP
NexLogin routes each browser profile through its own proxy, WebRTC included, so your real IP stays out of every session.