MyDefrag for Windows

  • Free
  • In English
  • V 4.3.1
  • 4.1
  • (243)
  • Security Status

Free defragmentation program for Windows users

MyDefrag is free software intended to perform a basic hard disk defragmentation. This can be employed to free up additional space or to identify potential problems within an operating system. This bundle functions by performing three separate tasks (analysing, defragmenting and optimising). However, users can choose which actions are needed. Other metrics displayed include the elapsed time as well as the percentage of the hard drive that has been successfully cleaned. There is no charge to download this software.

MyDefrag, previously known as JkDefrag, is a disk defragment and optimizing utility for Windows released under the GNU General Public License. It's completely automatic and very easy to use, works fast and hardly needs system resources. MyDefrag includes two optimization strategies and can handle both floppies and USB disks or sticks. It also features a command-line version for further configuration such as using the task scheduler or administrator scripts).

There is no "setup" or "install" and no configuration file. All you have to do is download the zip and unpack. MyDefrag's interface shows a high-detail map of your hard drive, refreshed 3 times per second. Bottom-left of the window is the beginning of the hard disk. The program uses a color code to distinguish between the different types of blocks: empty, in use, defragmented, unmovable and so on.


  • MyDefrag is free to install and activate.
  • This system can run from a bootable Windows CD-ROM.


  • Newer Windows versions are not supported.
  • The user interface is rather technical in nature.

Older versions

MyDefrag for PC

  • Free
  • In English
  • V 4.3.1
  • 4.1
  • (243)
  • Security Status

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Laws concerning the use of this software vary from country to country. We do not encourage or condone the use of this program if it is in violation of these laws.