JTR best tool for password Cracker

John the Ripper is the fast password cracking tool , JTR comes in various flavour such as Windows,Unix and Kali Linux.
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JTR is an OSP(Open Source Platform) which detects weak UNIX passwords. Besides many Unix crypt(3) password hash types, supported in “-jumbo” versions are hundreds of additional hashes and ciphers.

It is one of the most popular password testing and breaking programs as it combines a number of password crackers into one package, auto detects passwordhash types, and includes a customization cracker. It can be run against various encrypted password formats including several crypt password hash types most commonly found on various Unix versions .
Al l platforms supports by John 1.6 (including plain x86 or x64running most Unix-like systems, Win32, or DOS) are still supported. However, pre-compiled binary distributions of John 1.7 for Win32 and DOS are made available .

Only for educational purposes.