Majik Signature

Majik Signature lets you digitally sign virtually any file—documents, PDFs, Office files, images, audio, video, source code, archives, and more—to prove authenticity, integrity, and ownership.

Everything happens locally on your device. No accounts are required for offline signing and verification, and your files are never uploaded to our servers.

Built on the same cryptographic foundation as Majik Message, every signature combines Ed25519 (classical cryptography) with ML-DSA-87 (Post-Quantum, NIST FIPS-204). Both signatures must verify, providing protection against both today's attacks and future quantum threats.

Signed files remain fully usable. PDFs stay PDFs, videos continue playing, Office documents remain editable, and images open normally. Signatures are embedded into supported file formats whenever possible, with a universal fallback that preserves compatibility for virtually any file type.