VPN leak tests / Mullvad
Is Mullvad Leaking?
You think
"Mullvad doesn’t even ask for my email — I’m anonymous."
The mirror
An anonymous account means little if a web page can read your real address from the browser.
Provider detection compares your exit network with the networks Mullvad is known to use. Mullvad may also rent servers elsewhere, so a real Mullvad connection can occasionally read as "a VPN, but not Mullvad". The test runs in your browser and asks a Cloudflare STUN server for your public address — exactly what any web page can do. We don't see, store or log the result.
Testing…
Three checks run in your browser: IP masking, WebRTC and timezone. DNS has its own test.
About Mullvad
Mullvad is based in Sweden. It states a no-logs policy. Its apps are open source. It supports the WireGuard protocol. These are the provider's public claims and basic facts, not a guarantee.
Synthesis
How to fix Mullvad leaks
Turn on the kill switch
In the Mullvad app's settings, enable the kill switch (or its equivalent) so traffic stops if the tunnel drops instead of falling back to your normal connection.
Restrict WebRTC in your browser
Firefox: about:config → media.peerconnection.enabled → false. Brave: Settings → Privacy and security → WebRTC IP handling policy → "Disable non-proxied UDP".
Reconnect, then re-test
Reconnect Mullvad, make sure it is the connection this browser uses, and run the test again. A VPN only counts if the test says so.
Changed something? Prove it.
Re-run the test after every change — the verdict above updates in place.
Questions about Mullvad
Is Mullvad leaking my IP address?
Run the test above to see your real result. Mullvad can only protect the traffic it carries; a WebRTC leak or a timezone mismatch happens in the browser, outside the VPN's control.
How does this page know I am on Mullvad?
This page compares the network your connection exits from (its ASN) with the networks Mullvad is known to use — 2 verified so far. Mullvad may also rent servers on other networks, so a genuine Mullvad connection can occasionally show up as "a VPN, but not Mullvad".
Does Mullvad prevent WebRTC leaks?
Whether WebRTC leaks depends on your browser, operating system and VPN app settings together, which is why this page tests the real result instead of assuming. Restricting WebRTC in the browser removes the question entirely.
Where is Mullvad based?
Mullvad is based in Sweden. Jurisdiction affects legal requests to the provider; it has no effect on whether your browser leaks.