What is ophcrack? Ophcrack is a free Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a Graphical User Interface and runs on multiple platforms. Features: » Runs on Windows, Linux/Unix, Mac OS X, ... » Cracks LM and NTLM hashes. » Free tables available for Windows XP and Vista/7. » Brute-for