Deark is a portable command-line utility that can decode certain types of files, and either convert them to a more-modern or more-readable format, or extract embedded files from them. It also has an option (-d) to display detailed information about a file’s contents and metadata. It’s free and open source.


The download package includes source code, and a Windows 64-bit (x64) binary, in the “x64” directory. Windows users may need to install a utility that supports .tar.gz format, such as 7-Zip.


Bug reports

For bug reports and feature suggestions, please use the issue tracker at GitHub. If you don’t want to make a GitHub account, you can use email.


Among the formats supported (in one way or another) are:

See formats.txt for a complete list.