🇩🇪 DE
Tool

WebRTC test in your browser

Inspect visible connection candidates and compare them with your expected internet connection
Which addresses does your browser expose?

Only after you select “Start test” does your browser gather ICE candidates using the Google STUN services stun.l.google.com and stun1.l.google.com (port 19302). Those services see the source address of the STUN connection. This test requests neither camera nor microphone access and does not connect to another call participant.

HTTP reference at page load: 216.73.217.112
2026-11-03 05:21:42 UTC · Available only for the displayed IP version. Reload this page after changing your VPN connection.

Not tested yet. This test has not started any STUN requests.

– No result yet

Matching addresses are an observation, not complete proof of VPN protection.

Observed ICE candidates
CandidateAddress / nameAddress categoryInterpretation

How to compare a VPN connection

  1. Note your public IP without the VPN if you need a comparison.
  2. Connect the VPN and reload this page to update the HTTP reference.
  3. Run the test and compare public IPv4 addresses only with IPv4, and IPv6 only with IPv6.
  4. For a different address, check the expected VPN exit, split tunnelling and IPv6 support.

What do the indicators mean?

Green with a tick means only that a public address matches the HTTP reference. Yellow with an exclamation mark asks you to investigate a difference or an incomplete test. Neutral messages describe masked local addresses or a missing reference, for example. Red identifies a technical test failure, not automatically a VPN leak.

Why do I see mDNS names or no public address?

Browsers may replace local IPs with .local names or restrict gathering. Network filters and unreachable STUN services can also limit candidates. No public address in the results is therefore not a guarantee of protection against leaks.

Limits of this test

The observation comes from your browser, rather than a network check from our Düsseldorf server. No TURN server is configured and no remote peer is connected. The test does not measure video-call quality or every possible browser and VPN connection. Camera or microphone permission granted to other applications may affect behaviour.

Read the guide to WebRTC, ICE, STUN and these results

DNS leak test as a separate check · Show public IP

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