Donut Browser
Free tool · Runs in your browser

Is your real network leaking?

A DNS or IP leak reveals your true provider and location even behind a VPN or proxy. This test compares the IP the web sees with the addresses your browser exposes, and flags any mismatch.

Running the test…
01

What is a DNS leak?

With a VPN or proxy, your DNS lookups and traffic should all go through it. A leak happens when some fall back to your ISP's servers instead, exposing your real provider and location while you think you're hidden.

02

How to stop leaks

The reliable fix is routing every request - DNS included - through the same proxy, per identity. Donut Browser binds a dedicated proxy to each profile so nothing falls back to your real network.

Stay unlinkable

Every profile its own identity

Donut Browser is a free, open-source anti-detect browser. Each profile gets its own consistent fingerprint, IP and proxy, so the signals on these tools can't tie your accounts together or back to you.

Download Donut Browser Star on GitHub

Questions, answered.

It can reveal the internet provider and rough location you're actually connecting from, even when a VPN is masking your IP - often enough to deanonymize or block you.