Dangerzone converts untrusted documents like PDFs, Word files, and images into secure PDFs by rasterizing content inside isolated sandboxes. It strips potentially malicious code while preserving document structure, supporting formats from Microsoft Office to ODF and common image types.

The tool runs on Windows, macOS, and Linux using container-based sandboxing instead of full virtual machines. Recent commits show ongoing work improving macOS compatibility, dependency management, and OCR features. Its gVisor-based isolation prevents compromised documents from phoning home.

Originally inspired by Qubes OS's trusted PDF conversion, Dangerzone brings similar security to standard desktops. It underwent a 2023 security audit with no high-risk findings. Users can customize runtimes like Podman Desktop and run it in airgapped environments without configuration changes.