Available on Windows

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A system tool developed by Jeroen Kessels

Used by 348 people for 108 hours and 12 minutes

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.

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Popularity over the last 30 days (?)

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  • brycemdayton novice
    Overall:

    I like this program and Defraggler by Piriform the best of the free ones out there.

  • shuddertrix expert
    Overall:

    Very fast, stable, and works great as a screensaver for optimizing. Defrags better than Diskeeper and PerfectDisk for me.

  • kimme expert
    Overall:

    Lovely to use an an screensaver on Vista.

  • BSWE1987 fanatic

    Now, this a damn good defrag. Removed diskeeper to replace with this. I like the customizations using the command line and batch file syntax.

  • marthy enthusiast
    Overall:

    Open source, fast, and good. Equivilates to any commercial defragger.

  • mortonfox devotee
    Overall:

    Works pretty well, has a few innovative ideas that commercial defraggers haven't come around to implementing yet, and it's open source too! That said, I think defragging doesn't have to be done every day. Let it be an occasional maintenance item.

  • oneupthextraman devotee
    Overall:

    it works great, if you get a virus free version....but other than that its great.....

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