Home Authors Sitemap RSS News Feed


An Open Source Disk Defragmenter

English (US) Русский Deutsch

powered by lua

Get UltraDefrag at SourceForge.net. Fast, secure and Free Open Source software downloads

Valid XHTML 1.0 Transitional

The term UltraDefrag is a shorthand for the Ultra Defragmenter and holds no connection with potential owners of registered trademarks or other rights. All trademarks, brands, and names are the property of their respective owners.

UltraDefrag is an open source disk defragmenter for Windows. It can quickly defragment everything including files which are usually locked by Windows. For instance, UltraDefrag can re-join paging and hibernation files.


On the way to UltraDefrag v8 Pontiac Firebird Trans Am

We have a lot of exciting ideas for the next major release, but no time for development, as currently we have hard time working all days long just to survive. However, we made it easy for you to help us via donations. So far we have to raise $15.000 to leave paths of survival and return back to active UltraDefrag development. We have already collected $2320. Big thanks for your support!

$2320 collected towards $15000 [?]
PayPal - The safer, easier way to pay online!



  • Simple but efficient defragmentation algorightms.
  • Defragmentation of NTFS metafiles and streams.
  • Optimization of NTFS master file tables (MFT).
  • Automatic hibernation or shutdown after the job completion.
  • More...



Desktop: Windows NT 4.0, 2000, XP, Vista, 7, 8

Server: Windows NT 4.0, 2000, 2003, 2008, 2008 R2, 2012

32-bit, 64-bit and Itanium Editions