rarcrack (password cracker for rar/7z/zip archives) rarcrack uses a brute force algorithm to guess your encrypted compressed file's password. This program can crack zip, 7z and rar file passwords. Optional (recommended) dependencies: At runtime, you'll need unrar to crack rar files, and/or p7zip to crack 7z files. Note: this is *really slow*, as it executes zip/7z/rar repeatedly, once per generated password. If you're dealing with a zip file, fcrackzip is much faster (but doesn't support 7z or rar).