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fcrackzip is a fast password cracker partly written in assembler. It is able to crack password protected zip files with brute force or dictionary based attacks, optionally testing with unzip its results. It can also crack cpmask’ed images.

This package is useful for pentesters, ethical hackers and forensics experts.

Installed size: 81 KB
How to install: sudo apt install fcrackzip

  • libc6

A Free/Fast Zip Password Cracker

root@kali:~# fcrackzip -h

fcrackzip version 1.0, a fast/free zip password cracker
written by Marc Lehmann <> You can find more info on

USAGE: fcrackzip
          [-b|--brute-force]            use brute force algorithm
          [-D|--dictionary]             use a dictionary
          [-B|--benchmark]              execute a small benchmark
          [-c|--charset characterset]   use characters from charset
          [-h|--help]                   show this message
          [--version]                   show the version of this program
          [-V|--validate]               sanity-check the algorithm
          [-v|--verbose]                be more verbose
          [-p|--init-password string]   use string as initial password/file
          [-l|--length min-max]         check password with length min to max
          [-u|--use-unzip]              use unzip to weed out wrong passwords
          [-m|--method num]             use method number "num" (see below)
          [-2|--modulo r/m]             only calculcate 1/m of the password
          file...                    the zipfiles to crack

methods compiled in (* = default):

 0: cpmask
 1: zip1
*2: zip2, USE_MULT_TAB


Display zip information

root@kali:~# fcrackzipinfo --help

fcrackzip version 1.0, zipinfo - tell me about a zip file
written by Marc Lehmann <> You can find more info on

USAGE: zipinfo file...                the zipfiles to parse

Updated on: 2021-Nov-26