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Release Date:
2015-04-20 | Changelog
Submit Date:
Windows 2000/XP/2003/Vista/7/8
User Rating

(16 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!


  • 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 6.1.0:

  • documentation was cleaned up
  • configuration files were superseded by a single options.lua file
  • few minor bugs were fixed

FreewareFiles Clean Award FreewareFiles tested UltraDefrag Portable 6.1.0 on 2015-04-20 using leading antivirus scanners and found it 100% Clean.

User Reviews
"5.0.1 Portable"

Reviewer: -mweizer    Review Date: 2012-01-09
Average Rating (16 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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