WebRTC leak test

WebRTC is a browser feature that can reveal your real IP even while a VPN is connected. This test runs in your browser and shows what it exposes.

Addresses exposed via WebRTC:
  • testing…

How to use the webrtc leak test

  1. Open this page — the WebRTC test runs automatically.
  2. Read the list of exposed addresses.
  3. If a public IP appears while on a VPN, fix the leak with the steps below.

How to read this

Local addresses (like 192.168.x.x or an mDNS .local name) are harmless — that's your home network. A public address that matches your real IP means WebRTC is leaking around the tunnel.

How to fix a WebRTC leak

  • Use a browser extension that disables or limits WebRTC.
  • In Firefox, set media.peerconnection.enabled to false in about:config.
  • Use a VPN app with built-in leak protection.

Code & API examples

Use this from the command line or your code.

Browser only
// WebRTC runs in the browser; there is no server-side equivalent.
console.log(new RTCPeerConnection());
Check your public IP instead
curl ifconfig.me

See all endpoints at /api/tools/.

Frequently asked questions

WebRTC can gather your local and public IP addresses for peer-to-peer connections. A page can read them via JavaScript, revealing your real IP around a VPN.

Use a browser extension that disables WebRTC, set media.peerconnection.enabled to false in Firefox, or use a VPN app with built-in leak protection.
Related tools
Is my VPN working? Browser fingerprint test IPv6 leak test
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