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Test Your Browser for WebRTC IP Leaks WebRTC Leak Tester tool for network operations.

WebRTC Leak Tester illustration
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WebRTC Leak Tester

WebRTC Leak Tester tool for network operations.

1

Run the WebRTC Leak Test

Click the Start Test button to begin scanning for WebRTC leaks.

2

Review Detected IP Addresses

Check the results for any exposed public or local IP addresses.

3

Copy Your Results

Copy the leak test report for your records or further analysis.

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What Is WebRTC Leak Tester?

A WebRTC Leak Tester is a tool that checks if your WebRTC protocol is exposing your real IP address, even when using a VPN, by performing a webrtc leak test. Network engineers and developers use it to identify potential security risks in their networks, specifically to check for webrtc ip leaks. One specific problem it solves is detecting whether a VPN is leaking the user's public IP through WebRTC, which can be done with an online webrtc leak tester.

It runs entirely in the browser, using modern JavaScript and APIs like RTCPeerConnection, without sending any data to servers, allowing for instant results. The tool creates a peer connection, adds an ICE server, and listens for ice candidates to detect local and public IPs, essentially performing a check webrtc leak test. If it finds any local or public IPs, it displays them in a user-friendly format, including the option to copy the results.

What makes this tool different is its ability to provide detailed information about the detected IPs, including distinguishing between local and public IPs, which helps answer questions like "does my vpn leak webrtc". It also includes features like a button to copy the test results, making it easy to share or save them. The tool's interface is mobile-friendly and provides clear status messages, such as indicating if WebRTC is not supported in the browser or if an error occurred during the test, allowing users to easily perform a webrtc leak check.

Why Use WebRTC Leak Tester?

  • Instant results
  • 100% client-side
  • Mobile-friendly
  • No signup required

Common Use Cases

VPN Verification

Confirm your VPN is not leaking your real IP through WebRTC.

Privacy Auditing

Check browsers and devices for WebRTC-related privacy exposure.

Security Education

Demonstrate how WebRTC can reveal IP addresses behind proxies.

Network Troubleshooting

Identify unexpected IP address exposure in browser configurations.

Technical Guide

The tool works by creating an instance of RTCPeerConnection, a browser API that enables real-time communication between browsers, and setting up an ICE server using the stun protocol at stun.l.google.com:19302. It then creates a data channel and listens for ice candidate events, which are triggered when the browser discovers new network paths. When an ice candidate event is received, it extracts the IP address from the candidate string using a regular expression, and checks if the IP address is a local or public IP by matching it against specific patterns, such as 10.0.0.0/8, 192.168.0.0/16, and 172.16.0.0/12. The tool uses Sets to store unique local and public IPs, which are then converted to arrays and displayed in the user interface.

The tool also handles errors that may occur during the testing process by catching exceptions and displaying an error message to the user. If WebRTC is not supported in the browser, it displays a status message indicating that no IP leak is possible. The tool uses React hooks, such as useState and useCallback, to manage state and handle events, and ES6+ features like async/await and Promises to handle asynchronous operations. The testing process is timed out after 5 seconds using a Promise and setTimeout, to prevent the test from running indefinitely. The results are displayed in a user-friendly format, with options to copy the results to the clipboard using the copyToClipboard function from the lib/utils module.

Tips & Best Practices

  • 1
    All leak detection runs in your browser — no data is sent to external servers
  • 2
    Results appear instantly as WebRTC interfaces are probed
  • 3
    Use the copy button to save detected IP addresses for your records
  • 4
    Related tools

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Frequently Asked Questions

Q Is the WebRTC leak tester free?
Yes, completely free with no usage limits.
Q Is it safe to run a WebRTC leak test?
Yes, the test runs entirely in your browser with no data sent to external servers.
Q Does the WebRTC leak tester work on mobile?
Yes, the tool is fully responsive and works on mobile devices.
Q Can I use the WebRTC leak tester offline?
The page must be loaded first, but the test itself runs locally in your browser.
Q Which browsers support WebRTC leak testing?
All modern browsers including Chrome, Firefox, Edge, and Safari.

About This Tool

WebRTC Leak Tester is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.