Andreas Software
Free programs for Windows by Andreas Jönsson


AS-File Crypt 6.0 - Encrypt files with Salsa20, ChaCha20 or HC-256.

AS-File Crypt 6.0
Screenshot of AS-File Crypt 6.0

Encryption program for files that uses Salsa20, ChaCha20 or HC-256 with a 256-bit key. The program creates an encrypted (password protected) copy of any file and the program can later be used to decrypt (restore) the original file.


> Download AS-File Crypt 6.0 (Zip, 1.21 MB)

Revision Date: 2020-11-24.
License: Freeware.
Unicode Support: Yes.
Program Type: Portable, x64.
Operating System(s): Windows 7 (SP1+), 8.1 and 10. (Also Windows Server 2012 R2 and 2016.)
Language(s): English and Swedish.

This is the program's official website - download the program here to get the latest version/revision. The program is free.

Important information

Save the downloaded program if you have information encrypted with it. I do not guarantee compatibility between different versions/revisions of the program.

Speed Reference

Approximate values for an Intel Core i3-9100:
Salsa20/20, 80 MB/sec.
Salsa20/40, 40 MB/sec.
ChaCha20/20, 40 MB/sec.
ChaCha20/40, 20 MB/sec.
HC-256, 80 MB/sec.
HC-256 (Variant), 80 MB/sec.

Information regarding the integration feature

If you have User Account Control (UAC) activated you have to run AS-File Crypt as Administrator in order to add/update or remove the integration feature. This can be done by right-clicking on the EXE file. (Note: When you make a larger Windows upgrade, this integration may be cleared, then you need to add it again.)

Salsa20/40 & ChaCha20/40

If you start the program with the parameter "/SalsaChaChaDoubleRounds", the program uses Salsa20/40 and ChaCha20/40.

HC-256 Variant

If you start the program with the parameter "/HC256Variant", the program uses the proposed alternative variant of HC-256. This variant is expected to be slightly stronger.

Console Crypto

See also AS-ARC5, AS-ARC6, AS-ISAAC64, AS-LEA, AS-QuadCAST and AS-Rabbit. These are command line programs for encryption of files.

For text?

Check out AS-Text Crypt 6.0.