John the Ripper is a fast and configurable password recovery utility. It features several modes of operation including use of raw word lists and mangling rules as well as incremental brute force. The online, interactive demonstration below allows you to enter a password, which will be cracked using the default word list and incremental modes.
The Kali Linux rockyou.txt wordlist replaces John's default word list, providing a greater number of possible password candidates before brute force modes are attempted. If you would like to build a copy of this image locally, the build script can be found here.Host Console