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AttacheCasePicocrypt
Freemium

Personal use is free with optional payment; commercial use requires a paid registration…

 Free

Free and open source, no longer developed.

Windows, macOS Windows, macOS, Linux
  • Encrypts both individual files and whole folders
  • Available for Windows and macOS
  • XChaCha20 and Argon2id, with a design deliberately small enough to audit
  • Standalone portable executable on Windows, with no installation
  • Website and documentation are mainly in Japanese
  • macOS version is still in beta and cannot open AttacheCase 5 format files
  • Permanently archived and read-only since September 2025; there will be no more releases
  • Encrypts individual files, not partitions, drives or cloud folders
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-3.0
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked September 20, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.