Kryptor

A simple, modern file encryption and signing tool.

kryptor.co.uk
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Price
FreeFree and open source under the GPL.
Works on
Windows, macOS, Linux
Based in
Open-source project
Source code
Open source
Encryption
End-to-end encrypted

Kryptor is a small command-line tool for encrypting and signing files, built by UK developer Samuel Lucas as a friendlier alternative to GPG. It uses modern, well-regarded primitives from libsodium (XChaCha20-Poly1305, Argon2id and Ed25519) with almost no options to get wrong and it can optionally encrypt filenames. You can encrypt with a password or with public keys, which makes it handy for sending files to someone else. It is open source under the GPL, though as a single-maintainer project it has not had a formal independent audit of its own code and instead leans on the audited libsodium underneath. Pick it if you want straightforward, modern file encryption from the terminal without GnuPG's complexity.

No release or code change since January 2025. The project may no longer be maintained.

Strengths

  • Modern primitives via libsodium
  • Very few options to misconfigure
  • Password or public-key encryption
  • Cross-platform, free and open source

Considerations

  • Command-line only
  • No independent audit of its own code
Listed inFile Encryption

Kryptor alternatives

VeraCryptFull-disk and container encryption for your own machine.CryptomatorClient-side encryption for files you keep in the cloud.GnuPGThe standard open-source implementation of OpenPGP.Gpg4winGnuPG for Windows, with the Kleopatra key manager.