About

JkDefrag is a disk defragmenter and optimizer for Windows 2000/2003/XP/Vista/2008/X64.

Completely automatic and very easy to use, fast, low overhead, with several optimization strategies, and can handle floppies, USB disks, memory sticks, and anything else that looks like a disk to Windows. Included are a Windows version, a commandline version (for scheduling by the task scheduler or for use from administrator scripts), a screensaver version, a DLL library (for use from programming languages), versions for Windows X64, and the complete sources.

Important note:

The long-awaited version 4 is finally out. The program is now called “MyDefrag“, because it has a scripting language and you can customize just about every aspect of it. Here are the main features:

  • Fully functional freeware.
  • With scripting language.
  • Improved interface.
  • Higher speed.
  • Better optimization.
  • Lower memory usage.
  • Extensive documentation.
  • Easier to install.
  • …. and more!

The last version of JkDefrag is still available from this page, see below. But it is no longer supported.

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