Whonix is a desktop operating system designed for advanced security and privacy. Whonix mitigates the threat of common attack vectors while maintaining usability. Online anonymity is realized via fail-safe, automatic, and desktop-wide use of the Tor network. A heavily reconfigured Debian base is run inside multiple virtual machines, providing a substantial layer of protection from malware and IP address leaks. Commonly used applications are pre-installed and safely pre-configured for immediate use. The user is not jeopardized by installing additional applications or personalizing the desktop. Whonix is under active development and is the only operating system designed to be run inside a VM and paired with Tor.