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WebRTC Leak Test

Test if your real IP address is leaking through WebRTC while using a VPN or proxy with our free WebRTC leak test. The test uses browser-based ICE candidate gathering to detect all local IP addresses exposed by WebRTC and compares them against your public IP to identify leaks. Get clear pass/fail results, detailed IP classification, and actionable remediation steps - all processed locally in your browser with no signup required.

WebRTC Leak Test

Test whether your real IP address is being exposed through WebRTC while using a VPN or proxy. WebRTC is a browser technology used for video calls, file sharing, and peer-to-peer communication - but it can bypass your VPN and reveal your true IP to websites. This test detects local network IPs and checks them against your public IP. All testing is performed locally in your browser.

Click the button below to test if your real IP address is leaking through WebRTC. The test detects local network interfaces and compares them with your public IP.

Why Use Our WebRTC Leak Test?

Instant WebRTC Leak Detection

Our WebRTC leak test instantly checks if your real IP address is being exposed through WebRTC. It enumerates all local network interfaces via WebRTC ICE candidates and compares them against your public IP. Get a clear pass/fail result in seconds with detailed breakdown of every detected IP address.

Local & Public IP Comparison

The WebRTC leak test detects both local IP addresses (via WebRTC STUN requests) and your public IP (via ipify.org). By comparing these, it determines if your VPN or proxy is effectively hiding your real IP or if WebRTC is bypassing your privacy protection by exposing public IPs through local network interfaces.

Complete Privacy Protection Testing

All testing is performed locally in your browser. The only external request is to ipify.org to verify your public IP - no data is stored, logged, or sent to our servers. Your local IPs and test results remain entirely on your device, making this a completely private WebRTC leak test.

WebRTC Leak Test Online - No Installation

Use our free WebRTC leak test directly in your browser with no downloads, no plugins, and no account required. Get actionable remediation steps if a leak is detected, including browser-specific configuration guidance and VPN recommendations. Test as many times as you need.

Common Use Cases for WebRTC Leak Test

VPN Privacy Verification

After connecting to a VPN, use the WebRTC leak test to verify that your real IP address is not being exposed. Many VPNs claim WebRTC protection but may still leak your IP through browser WebRTC requests. Regular testing ensures your VPN is working as expected and your privacy is maintained.

Proxy & Tor Browser Check

Users of proxy servers, Tor Browser, or other anonymization tools should test for WebRTC leaks. These tools can be particularly vulnerable to WebRTC-based IP leakage since WebRTC can bypass proxy settings and make direct connections, revealing your true IP even when using advanced anonymity tools.

Corporate Security Audit

IT security teams can use the WebRTC leak test to audit employee browsers for WebRTC-related privacy risks. Corporate VPNs and remote access solutions should be verified to ensure they do not leak internal IP addresses through WebRTC, which could expose internal network topology to external websites.

Journalist & Activist Privacy

Journalists, activists, and human rights defenders working in sensitive environments rely on privacy tools to protect their identity. The WebRTC leak test helps verify that their anonymity setup is not compromised by WebRTC leaks that could reveal their true location and put them at risk.

Personal Privacy Checkup

Privacy-conscious individuals should regularly run a WebRTC leak test as part of their digital privacy routine. Browser updates, new extensions, or changed settings can inadvertently re-enable WebRTC or alter its behavior, potentially creating a privacy vulnerability where none existed before.

WebRTC Application Debugging

Developers building WebRTC-based applications (video conferencing, file sharing, P2P apps) can use the WebRTC leak test to understand how their browser exposes network interfaces via WebRTC. This helps debug connectivity issues, test STUN/TURN configurations, and ensure proper ICE candidate handling.

Understanding WebRTC Leaks

What is a WebRTC Leak?

WebRTC (Web Real-Time Communication) is a browser technology that enables peer-to-peer audio, video, and data sharing without plugins. To establish direct connections, WebRTC uses ICE (Interactive Connectivity Establishment) to discover all possible network paths, which includes querying the OS for every network interface IP address. A WebRTC leak occurs when a website can discover your real IP address through WebRTC even while you are connected to a VPN or proxy. Since WebRTC makes direct connections that bypass your VPN tunnel, your real IP can be exposed to any website that uses WebRTC - or even websites that simply embed WebRTC-triggering JavaScript.

How Our WebRTC Leak Test Works

  1. Local IP Detection via WebRTC: The test creates an RTCPeerConnection object and triggers ICE candidate gathering by creating a data channel and an SDP offer. Each ICE candidate contains the IP address of a local network interface. The tool collects all unique IPv4 addresses revealed during this process.
  2. Public IP Lookup: The tool fetches your public IPv4 and IPv6 addresses from api.ipify.org and api6.ipify.org. These requests are made with a 5-second timeout to avoid hanging if blocked.
  3. Comparison & Analysis: Each detected local IP is classified as Loopback, Private (RFC 1918), Link-Local, or Public. If any local IP detected via WebRTC is classified as Public, the test flags a leak - because a public IP should never appear as a local network interface when a VPN is active.

How WebRTC Bypasses VPNs

  • Direct Interface Enumeration:WebRTC asks the operating system for every network interface available, not just the virtual VPN interface. It discovers your physical network adapter's IP even when your VPN software has created a virtual adapter.
  • STUN Server Requests:WebRTC sends requests to STUN (Session Traversal Utilities for NAT) servers to discover the public IP and port. These requests may bypass your VPN tunnel if the browser's routing table has not been configured to route all traffic through the VPN interface.
  • Browser-Level Bypass: WebRTC operates at the browser level, not the system level. VPN software that only routes system-level traffic may not affect browser-level WebRTC connections. This is why browser extensions and VPN-integrated WebRTC blocking are often necessary in addition to system-level VPN protection.
  • IPv6 Leakage: If your ISP provides an IPv6 address and your VPN only protects IPv4 traffic, WebRTC can still discover your IPv6 address via ICE candidates, revealing your true IP even though your IPv4 appears protected.

Privacy, Security & Availability

Our WebRTC leak test processes everything in your browser. The only external request is to api.ipify.org to determine your public IP - this is necessary to compare against WebRTC-detected IPs. We do not store, log, or transmit your IP addresses or test results to any server. The tool is 100% free with no signup, no usage limits, and no tracking. Use it as many times as you need, completely free forever. No installation or downloads are required - just open your browser and test. Note that some browsers (particularly Safari) may restrict WebRTC ICE candidate visibility, which can affect test accuracy. For best results, use Chrome, Firefox, or Edge.

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Frequently Asked Questions About WebRTC Leak Test

A WebRTC leak occurs when a website can discover your real IP address through WebRTC (Web Real-Time Communication) even while you are connected to a VPN or proxy. WebRTC is designed to find the most efficient network path for peer-to-peer connections, which means it queries your operating system for all available network interfaces - including the real ones that your VPN is supposed to be hiding.

WebRTC can bypass your VPN by making direct network interface queries at the browser level. While your VPN routes system-level traffic through its tunnel, WebRTC operates within the browser and can discover your physical network adapter's IP address through ICE candidates. Additionally, WebRTC STUN requests may bypass the VPN tunnel entirely if the browser's routing configuration allows it, revealing the public IP assigned by your ISP.

Yes, it is completely safe. The test creates an RTCPeerConnection in your browser and collects ICE candidates to detect local IPs. No data is sent to our servers - the only external request is to api.ipify.org (a public IP service) to determine your current public IP for comparison. Your test results and IP addresses remain entirely on your device.

There are several ways to fix WebRTC leaks: use a VPN that includes WebRTC leak protection (many premium VPNs offer this), install browser extensions like uBlock Origin or WebRTC Leak Prevent, or disable WebRTC manually. In Firefox, set "media.peerconnection.enabled" to "false" in about:config. In Chrome, use command-line flags or extensions. Some privacy-focused browsers like Brave disable WebRTC leaks by default.

If the test only detects 127.0.0.1 (loopback), it likely means your browser restricts WebRTC ICE candidate visibility. Safari and some mobile browsers limit the information exposed through ICE candidates for privacy reasons. For a more comprehensive test, try using Chrome or Firefox on a desktop computer. Some corporate environments and VPN software also block or restrict WebRTC functionality.

Your local IP is the address assigned to your device on your local network (e.g., 192.168.1.5 on your home WiFi), detected through WebRTC ICE candidates. Your public IP is the address assigned by your ISP that the internet sees. When using a VPN, your public IP should be the VPN server's IP, not your ISP-assigned IP. If WebRTC reveals a local IP that is a public address (not in private ranges), that indicates your real IP is leaking through WebRTC.

Yes, completely disabling WebRTC will prevent browser-based video calls (Google Meet, Zoom Web), peer-to-peer file sharing, and other real-time communication features from working. Instead of disabling WebRTC entirely, consider using a VPN with built-in WebRTC leak protection, using a browser extension that selectively blocks WebRTC on non-essential sites, or configuring your browser to only allow WebRTC through your VPN interface.