Best Free Defragmentation Software for Windows 10

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Anand Khanse is the Admin of, a 10-year Microsoft MVP Awardee in Windows (2006-16) & a Windows Insider MVP. Please read the entire post & the comments first, create a System Restore Point before making any changes to your system & be careful about any 3rd-party offers while installing freeware.


  1. I am usually pretty content using the built in defragger, and use it on my storage drives (SSD as main OS drive, no defrag needed!). I have tried Defraggler in the past and loved it. But, I really don’t need anything beefy these days.

  2. Defrggler. Works well and the Piriform folks keep it updated

  3. André Ziegler

    Since Vista the build-in tool is enough. All other tools are useless.

  4. bilal@cheap designer bags

    defragger is a new thing to me and your post is very much helpful in understanding it

  5. Kulsa

    i think iobit smart defrag should be on list tried and test works excellent on my windows 7 x64

  6. Miladtexas

    JKDefrag was a really good software . I was looking for new version of it and thanks for your help . I should check MyDefrag . it must be good . Thanks .

  7. gggirlgeek

    JkDefrag and it’s successors (MyDefrag) is a miracle for old or slow PC’s. It is my highest priority whenever I fix someone’s PC. Windows Defrag doesn’t “optimize” the disk and it doesn’t allow you to automatically clean temp folders before scheduled defrags. This is essential.

    I also disable Win7’s automatic defragmentation (through Task Scheduler) since it will ruin MyDefrag’s optimization and file sorting. This slows the disk down all over again and creates a lot more stress on the hard drive.

    I need to give Puran a shot though since it has MFT defrag.

  8. IntelliMoo

    now there’s an idiot. LOL

  9. gnrsu

    I think WinContig is specially defragment stand-alone file or folder!

  10. mark

    Puran wipes out restore point. Major flaw

  11. George Melendez Correa

    Mo discussion here …. the best defrag tool, bar none, is MyDefrag ( JKDfrag) … i have used and experimented with all that are mention and absolutely MyDefrag is the only one that has speed up my boot time ( faster boot) better performance and i get faster access to files and folders. Yes, these defrag tools are good and they all have many options and features and some are extremely fast defragging but NON, and i repeat, NOT ONE, lower my boot time when compared after performing a defrag with Windows 7 default defragger and then using any of the tools mention except MyDfrag. My boot time with Windows 7 defragger was 55 to 58 seconds on average and with the other tools the best i achieved was 44 seconds with Puran. MyDefrag gave me a boot time of 37 to 39 which is quite fast. It chopped of 18 to 19 seconds and that is why we all defrag our hard drives, to achieve maximum performance and better boot times. So i will stick with MyDefrag even though it is not beautiful and it is “slow” defragging and it really doesn’t have many options or features except that you can write your own scripts which is handy for power users and you can program scheduled defrags. Just give it a try and you will discover what i did…. MyDefrag does it’s job and period…….. no questions asked…. thanks J.C. Kessels for MyDefrag….

  12. George Melendez Correa

    All defrag tool will erase your restore points. This is an issue that has been debated for quite awhile. It has to do with the standard defragmentation API
    by Microsoft, a system library that is included in Windows OS and most consider that fault to be a bug. I personally don’t use Windows Restore since i perform image back-up of my OS and files and folders so i don’t worry about that.

  13. missismiggins

    Got to agree with you on that one. I have been using Mydefrag for years when it was known as JKdefrag, by far the best defragmenter there is and it is FREE! It knocks the pants off Microsofts offering (which I gave up on a long time ago in the early days of Win7)

  14. Bob

    Does MyDefrag wipe out the Windows Restore points?

  15. Victor Cristy

    I respect your opinion, have a question to ask you, in MYDefrag thers a note on their website that its best to restart windows in “Safe Mode” so as to get the most use of the program and can access more files that way? Is this another way that can be done using other defrag tools? What is your suggestion? Thank you

  16. Defragging in safe mode can give better results.

  17. Victor Cristy

    Thank you Anand. 🙂

  18. Victor Cristy

    Thank You very much for the quick response.

  19. Ray

    The best of the best (free) : Auslogics Disk Degfrag, JKDefrag, Diskeeper, Defragler, UltraDefrag
    The best of the best (not free) : O&O Defrag

    If you can to have O&O Defrag so go go go because is the better in this domaine

  20. Software182

    Are you serious ?

    Diskeeper isn’t free !

  21. Heru Sutanto

    diskeeper is not free LOL

  22. Halsey Taylor

    Beware, Auslogics will tray-popup spam you, and give you an upsell page at every mouseclick. Even uninstalling forces you to take a survey, dodge a pop-up, visit an upsell webpage and CLOSE THE BROWSER before uninstall will complete. Not a good idea to trust your data to someone who uses tactics one notch below ransomware.

    Don’t install it under any circumstances, even curiosity. If they spent as much time making software as they did spamming, they’d really have something, but as it stands, their defrag is middling at best.

    If you just want a simple defrag, UltraDefrag is your best bet. Simple UI and comes in a portable version, so you don’t even have to install it.

  23. john

    Hello! Why I cant run UltraDefrag in my Windows 7?

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