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Release Date:
2013-05-17 | Changelog
Submit Date:
Windows 2000/XP/2003/Vista/7
User Rating

(14 Votes )

Software Product Description

UltraDefrag is a powerful, open source defragmentation tool for Windows. Itīs engine is very fast, because it is created as a kernel-mode driver.

There are three interfaces to them: graphical, console and native. The first is very useful, because it uses cluster map visualization. Console is good for task scheduler, and native tool - for advanced users and programmers.

UltraDefragīs design is very ergonomic: no skins, no localization, no animation and so on. Itīs a truely small and powerful program!

It can be used on Windows 2000, Windows XP, Windows Server 2003 and Windows Vista. NT 4.0 support is currently unavailable.


  • very fast defragmentation, because engine is kernel mode driver and has optimal algorithm.
  • very small engine written in pure C language.
  • nice graphical interface - compact and comfortable.
  • safety, because file moving is realized with special system calls.
  • simple to use.
  • generate html reports.
  • has useful filters.
  • free: distributed with full source code under the GNU General Public License.

Whatīs New in version 6.0.2:

  • the FAQ section of the handbook now contains information about how to set up v6 to optimize similarly to v5
  • the Explorer context menu is now reduced to a single entry with sub-menu on Windows 7 and above
  • the following translations were updated: Albanian, Danish, Filipino (Tagalog), Indonesian (Bahasa Indonesia), Javanese, Polish, Portuguese (BR)
FreewareFiles Clean Award FreewareFiles tested UltraDefrag Portable 6.0.2 on 2013-05-17 using leading antivirus scanners and found it 100% Clean.

User Reviews
"5.0.1 Portable"

Reviewer: -mweizer    Review Date: 2012-01-09
Average Rating (14 Votes )
Pros:  None

Cons:  They seem to blend the installable reviews with the portable version

Other Thoughts:  the portable version is unable to boot time defrag

Put the update info in Publishers Comment

It is set to connect to internet to check for update. Can be changed in Options
Read All Reviews (3 User Reviews) | Write A Review |
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