Ophcrack is a Windows password cracker based on a time-memory trade-off using rainbow tables. This is a new variant of Hellman's original trade-off, with better performance. It recovers 99.9% of alphanumeric passwords in seconds.


  • Cracks LM and NTLM Windows hashes
  • Free tables available for Windows XP, Vista and 7
  • Brute-force module for simple passwords
  • Audit mode and CSV export
  • Real-time graphs to analyze the passwords
  • LiveCD available to simplify the cracking
  • Loads hashes from encrypted SAM recovered from a Windows partition

Project Samples

Project Activity

See All Activity >

Follow ophcrack

ophcrack Web Site

Other Useful Business Software

Master DevOps using online learning resources from ACM! Master DevOps using online learning resources from ACM! Icon
Master DevOps using online learning resources from ACM! Icon

Stay current with the DevOps tools that are redefining how software and IT teams collaborate, and learn how to transform your organization today.

Master emerging DevOps technologies and frameworks. Learn the foundations of DevOps, or take a deep dive into cutting-edge technologies and frameworks like Docker, Amazon Web Services, Kubernetes, Ansible, Ubuntu, Agile, SDN and more with ACM’s collection of more than 50,000 online books, courses and videos from O’Reilly, Packt, John Wiley, IT Revolution, Skillsoft and other leading publishers.

Rate This Project

Login To Rate This Project

User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5

User Reviews

  • Downloaded fine, but had malware TSPY_PWDUMP_CA25037B.TOMC

  • ophcrack-vista-livecd-3.6.0.iso doesn't have tables. Kinda makes it useless to use. When trying to download it with the browsers provided, I just keep getting TLS errors.

    1 user found this review helpful.
  • I have Windows 7; I forgot my password & I'm the administrator on the computer. This program is supposed to unlock the account for you or crack the password, isn't it, or am I confused? This is, I believe, the third program of this type I have tried. Everything starts fine, downloads quick, but when I go to "run" the program, it, on all three programs, asks me for the administrators password. I do not have the password which is exactly why I am trying to use the program in the first place! I'm just so confused. Am I doing something wrong? Or does this program just not do what I think it does? SOMEONE, please help me.

Read more reviews >

Additional Project Details

Intended Audience

System Administrators, Developers, End Users/Desktop

User Interface

Web-based, Command-line, Qt

Programming Language

C++, C, Java