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John the Ripper password cracker
John the Ripper is an Open Source password security auditing and password recovery tool available for many operating systems.
John the Ripper jumbo supports hundreds of hash and cipher types, including for: user passwords of Unix flavors
(Linux, *BSD, Solaris, AIX, QNX, etc.), macOS, Windows, "web apps" (e.g., WordPress), groupware (e.g., Notes/Domino), and
database servers (SQL, LDAP, etc.);
network traffic captures (Windows network authentication, WiFi WPA-PSK, etc.);
encrypted private keys (SSH, GnuPG, cryptocurrency wallets, etc.),
filesystems and disks (macOS .dmg files and "sparse bundles", Windows BitLocker, etc.),
archives (ZIP, RAR, 7z), and document files (PDF, Microsoft Office's, etc.)
These are just some of the examples - there are many more.
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John the Ripper is free and Open Source software,
distributed primarily in source code form.
If you would rather use a commercial product, please consider
John the Ripper Pro,
which is distributed primarily in the form of "native" packages
for the target operating systems and in general is meant to be easier to
install and use while delivering optimal performance.
To verify authenticity and integrity of your John the Ripper downloads, please
use our
GnuPG public key.
Please refer to these pages on
how to extract John the Ripper source code from the tar.gz and tar.xz archives and
how to build (compile) John the Ripper core
(for jumbo, please refer to instructions inside the archive).
You can also consider the unofficial builds on the contributed resources list further down this page.
These and older versions of John the Ripper, patches, unofficial builds, and many other related files are also
available from the Openwall file archive.
You can browse the documentation for John the Ripper core online, including a
summary of changes between core versions.
Also relevant is our
presentation on the evolution of password cracking.
There's a collection of wordlists for use with John the Ripper.
It includes lists of common passwords, wordlists for 20+ human languages, and files with the common passwords and
unique words for all the languages combined, also with mangling rules applied and any duplicates purged.
yescrypt and crypt_blowfish
are implementations of yescrypt, scrypt, and bcrypt - some of the strong password hashes also found in John the Ripper -
released separately for defensive use in your software or on your servers.
passwdqc is a proactive password/passphrase strength checking and policy enforcement toolset,
which can prevent your users from choosing passwords that would be easily cracked with programs like John the Ripper.
We can help you integrate modern password hashing with
yescrypt or crypt_blowfish,
and/or proactive password strength checking with
passwdqc,
into your OS installs, software, or online services.
Please check out our services.
There's a mailing list where you can share your experience with John the Ripper and ask questions.
Please be sure to specify an informative message subject whenever
you post to the list
(that is, something better than "question" or "problem").
To subscribe, enter your e-mail address below or send an empty message to
<john-users-subscribe at lists.openwall.com>.
You will be required to confirm your subscription by "replying"
to the automated confirmation request that will be sent to you.
You will be able to
unsubscribe
at any time and we will not use your e-mail
address for any other purpose or share it with a third party.
However, if you post to the list, other subscribers and those
viewing the archives may see your address(es) as specified on your message.
The list archive is available
locally and via
MARC.
Additionally, there's a
list of selected most useful and currently relevant postings on the
community wiki.
Contributed resources for John the Ripper:
Local copies of these and many other related packages are also
available from the Openwall file archive.
John the Ripper is part of
Owl,
Debian GNU/Linux, Fedora Linux, Gentoo Linux, Mandriva Linux, SUSE Linux,
and a number of other Linux distributions.
It is in the ports/packages collections of FreeBSD, NetBSD, and OpenBSD.
John the Ripper is a registered project with
Open Hub
and it is listed at
SecTools.
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