OnionScan is a free and open source tool for investigating the Dark Web. For all the amazing technological innovations in the anonymity and privacy space, there is always a constant threat that has no effective technological patch - human error.

Whether it is operational security leaks or software misconfiguration - most often times the attacks on anonymity don't come from breaking the underlying systems, but from ourselves.

OnionScan has two primary goals:

We want to help operators of hidden services find and fix operational security issues with their services . We want to help them detect misconfigurations and we want to inspire a new generation of anonymity engineering projects to help make the world a more private place.

Secondly we want to help researchers and investigators monitor and track Dark Web sites . In fact we want to make this as easy as possible. Not because we agree with the goals and motives of every investigation force out there - most often we don't. But by making these kinds of investigations easy, we hope to create a powerful incentive for new anonymity technology (see goal #1)