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Developer(s) Petter Nordahl-Hagen (Formerly Petter Nordahl)
Initial release May 28, 1997; 17 years ago (1997-05-28)
Stable release 1.00 / February 1, 2014; 10 months ago (2014-02-01)
Written in C
Operating system Linux
Available in English
Type Data recovery
License GPLv2

chntpw is a software utility for resetting or blanking local passwords used by Windows NT, 2000, XP, Vista, 7, 8 and 8.1. It does this by editing the SAM database where Windows stores password hashes.

Where is used[edit]

The chntpw utility is included in many various Linux distribution, including security focused ones:

  • BackTrack – security focused Linux distribution
  • SystemRescueCD – recovery focused Linux distribution
  • Fedora – general distribution
  • and many others...

Licence change[edit]

For the software's 10th anniversary, the author changed the license from a non-commercial one to the GNU General Public License (GPL) Version 2.[1]


  1. ^ The Offline NT Password Editor History

External links[edit]