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What Is a WebRTC Leak? How to Test and Fix It in 2026

What Is a WebRTC Leak? How to Test and Fix It in 2026

27. May 2026Category Privacy & Security2 min read
What Is a WebRTC Leak? How to Test and Fix It in 2026

What Is WebRTC?

WebRTC (Web Real-Time Communication) is an open-source technology built into modern browsers that enables real-time audio, video, and data communication directly between browsers — without needing a plugin or third-party software. It powers video calls on Google Meet, voice chat in Discord's browser version, and peer-to-peer file sharing tools. For the strategic overview of where WebRTC leaks sit alongside DNS, IPv6, and other privacy threats, see our complete privacy tools guide.

WebRTC is genuinely useful. But it has a serious privacy flaw: to establish a direct peer-to-peer connection, your browser must discover and share your IP addresses — including your real public IP address. This happens even when you are connected to a VPN.

What Is a WebRTC Leak?

A WebRTC leak occurs when your browser reveals your real IP address through WebRTC's ICE (Interactive Connectivity Establishment) protocol, bypassing your VPN tunnel. The website or peer you are communicating with — or any JavaScript running on the page — can read these IP addresses using simple browser APIs.

WebRTC leaks are particularly dangerous because they are invisible. There is no error message, no warning, no indicator that your real IP is being exposed.

How to Fix a WebRTC Leak

Fix WebRTC Leaks in Chrome

  • Use a browser extension: Extensions like "WebRTC Leak Prevent" can restrict how Chrome handles WebRTC IP exposure.
  • Switch to Brave: Brave browser blocks WebRTC leaks natively without extensions.

Fix WebRTC Leaks in Firefox

Type about:config in the address bar, search for media.peerconnection.enabled, and set it to false.

Fix WebRTC Leaks in Edge

Go to edge://settings/privacy, find "Prevent sites from detecting my real IP address using WebRTC" and enable it.

Summary

WebRTC leaks are a silent but serious privacy threat for anyone using a VPN. They expose your real IP address through your browser without any visible warning. Test regularly using SpeedIQ's WebRTC leak test, and configure your browser to prevent non-proxied UDP connections.

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