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One page per leak channel — WebGL, canvas, WebRTC, DNS — each showing precisely what your browser hands over without being asked.
Opens in a new tab. We do not control this site and it may have changed since we catalogued it.
BrowserLeaks sits in Privacy & Security under Learn, filed as coffee break.
About this category: Breach checkers, fingerprint tests, throwaway inboxes and plain-English readings of terms of service. Mildly alarming, entirely free.
Yes. BrowserLeaks is free to use and needs no account.
No. You can use BrowserLeaks without signing up for anything.
Not well. We file BrowserLeaks as desktop only, so open it on a laptop or desktop computer.
Yes, we file it as safe for work. It also works muted.
We file it as "Coffee break": Five to fifteen minutes of proper attention.
The EFF's test showing how uniquely identifiable your browser is from fonts, plugins and screen size alone. Most people are one in millions.
Runs a standard or extended check to reveal which servers actually saw your DNS lookups. The quickest way to catch a VPN not doing its job.
Search without the profile building, plus bang shortcuts that fire your query straight at another site. Type an exclamation and w for Wikipedia.
Search any Android app and see the tracking libraries baked into it. The results for the popular ones are routinely grim.
Blind items published daily since 2006, unverifiable by design, and treated as scripture by a very large comment section.
The tidied-up archive of internet horror folklore, from Slender Man to the stories a school friend swore blind were true.
Reader-submitted horror stories with narrated versions, sorted so you can pick your poison: rituals, dolls, or something in the loft.
An explorable on how ideas and riots spread through a social network, with the contagion thresholds under your control.
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