(based on 88 reviews)
MyDefrag (formerly JkDefrag) 4.1.2

MyDefrag (formerly JkDefrag) by J.C. Kessels Screenshot MyDefrag (formerly JkDefrag) Screenshot

MyDefrag (formerly JkDefrag) is a disk defragmenter and optimizer for Windows. 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.

  • License: open source
  • Updated: Aug 2, 2009
  • Publisher: J.C. Kessels

Reviews:

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Rated 50/50 by Mark_Lawrence at Apr 7, 2010

Very thorough defragmentation and optimization with impressive performance benefits. Safe and reliable due to use of Windows defrag API. No option to shut down PC on completion. 'No frills' interface. The best free application I have found for defragmention and optimization only. Ideal for IT professionals but general users may prefer more the user-friendly interfaces and additional functionality of alternatives such as 'Auslogics Disk Defrag'.

Rated 50/50 by Icuasurunique1 at Apr 15, 2010

Everything -N o n e - Must Try!

Rated 40/50 by cajonaitis at May 4, 2010

The product eliminated many free space elements. Retrieved about 15% more disk after another defragger. Slow It took four days to defrag a 600mb external hard drive. Other the slowness I think that this is an excelent defragger. It eliminates many space eaters that other defraggers do not. MyDefrag 4.2.9 runs faster once it does not have to get through all the old defrag errors. It save a lot of space by combining smaller freespaces

Rated 40/50 by 18cdbob18 at May 29, 2010

Easiest Defragger I've ever used. Fastest as well. Works particularly well in Safe Mode.Easy download. Easy learning curve. If you use System Restore, depending on your OS, you may lose its functionality as many or all restore points may vanish if you select a performance level that includes Optimization. No support other than a small users forum. Beats the pants off of Windows Defrag and easier to use than it's competitors. But if you go with its Optimizer level, you may find it incompatible with System Restore points, useful to have working when your OS destabilizes.

Rated 40/50 by cumbraexp at May 29, 2010

gives a choice of varying degrees of de-fragmentation nothing comes to mind very good application

Rated 30/50 by Veteran65 at Jun 15, 2010

Really effective in moving all your files into the outer ring of your disk Which has the highest reading speed It does speed up your PC ! Put a lot of strain in your PCOnly use this once in a while like once a monthYou can mess up your disk with this software Nice for busy people who want to keep its PC in shapeBut over usage means death for your hard drive

Rated 50/50 by frankw200 at Jul 9, 2010

clean UI, fast response,most thorough defrag, lots of defrag choices could use a faster graphic UI

Rated 50/50 by Lepracon23 at Aug 11, 2010

The easiest defag available. Non that I am aware of