WebRTC Leak Test

Browsers today use WebRTC to communicate with websites. However, this also enables queries that can reveal a user’s real IP address, even if they use a VPN provider. Our WebRTC Leak Test is designed to show whether or not you are affected by this yourself.

WebRTC leak test. What your browser reveals about you.

WebRTC is a function used by many websites. The browser can be tricked by the remote site into performing a LocalLoop, revealing both the local IP address and the external IP address of the internet router. This would lead to the real IP address of the user and thus his location is also known, although a VPN service is used. A WebRTC leak test simulates exactly this process in the browser and thus shows whether you are sufficiently protected against this problem.

WebRTC leak test

Starte WebRTC Test

WebRTC test instruction

  • This WebRTC Leak Test is quite easy to use. It is sufficient to start the test and a short time later the result that we were able to query is displayed for the browser used.
  • It is recommended to repeat this test with other browsers.
  • The WebRTC test is compatible with all common browsers on PC, Mac, Android or iOS devices.


This test is designed to visualise the data that the user’s browser can communicate to a web server via the WebRTC communication channels. The data in this test is ONLY executed locally and is stored at most in the local cache of the browser at the user’s site. We have no access to this data and the queries are not logged on our web server.

The entire “VPN Leak Test” is also available on our site here.

What is WebRTC?

WebRTC (Web Real-Time Communication) is a free and open-source project that enables web browsers and mobile applications to perform real-time communication (RTC) using simple application programming interfaces (APIs). It enables audio and video communication within web pages by providing direct peer-to-peer communication without the need to install plugins or download native applications.

WebRTC tests can show you what websites can recognise from you via this communication interface in your browser. 

How to prevent WebRTC leaks

In principle, WebRTC can also be deactivated in the browsers. This can be done via the browser settings, but sometimes this is hidden a little. There are also browser extensions that can usually be found under the term “WebRTC deactivate”. It is also possible to adjust the firewall of your device so that WebRTC queries cannot reach the router and thus your IP address. Another way is to use a VPN service that makes the appropriate settings on your device.