Top Free Defragmentation Software for Windows 10/8/7

Microsoft has substantially improved the native Defragmenting Utility in Windows, with the release of Windows Vista, and further improved upon it in Windows 10/8/7. The defrag engine and the manageability of fragmentation is much better than what existed in Windows XP.

The inbuilt Disk Defragmenter in Windows now runs as a low priority task in the background without affecting the performance of the computer. It uses the Task Scheduler to automatically keep the hard disk defragmented, by running when the machine is idle and therefore does not affect the performance of the Windows. Windows 7 will disable disk defragmentation on SSD system drives as you do not need to defrag a Solid State Drive. In Windows 10/8, SSD Defragmentation is enabled by default.

Read: Do you need to defrag SSD?

The Windows Defragmenter defragments files which are smaller than 64 MB only, for according to Microsoft’s benchmarks, fragments of this size, which already consist of at least 16000 contiguous clusters, have a negligible impact on performance. This means that games and large media files are effectively left as they are! Microsoft feels that to defrag to combine fragments that are 64MB or larger requires significant amounts of disk I/O, which is against the principle of minimizing I/O, and puts more pressure on the system to find large, contiguous blocks of free space.

If you still want to defrag files larger than 64 MB too, you need to use certain other defrag parameters to be able to defragment files of all sizes.

For most, the best practices for using defragmentation in Windows 10/8/7 are simple – you do not need to do anything. But if you feel that you need to have a 3rd party defrag tools to defrag better and/or even defrag very large files easily and quickly, or if in spite of doing your best to troubleshoot the inbuilt disk defrag utility, you are unable to get the inbuilt defrag tool working, you might want to check out these 5 free defragmenting software.

Best Free Defragmentation Software


UltraDefrag is an open source disk defragmenter for Windows has been optimized to complete the job quickly, reliably and achieve best results possible. It defragments any system files including registry hives and paging files quickly and efficiently.

UltraDefrag features:

  • Simple to use
  • Simple and powerful
  • Modern design Graphical User Interface (GUI)
  • Boot time interface to process locked system files
  • Generates HTML reports
  • Command line tool useful for automation


This free disk defragmenter for Windows, earlier know as JKDefrag, organizes files into zones, such as directories, Windows files, files used while booting, regular files, and rarely used files. Files that are often accessed are placed at the beginning of the hard disk while the files that are commonly used together are placed in proximity to each other. This organization, results in a dramatic speed increase, thereby allowing the computer to function efficiently.

MyDefrag is completely automatic and can handle USB disks/sticks and floppies.

MyDefrag Features:

  • Easy to install
  • Full functional freeware
  • Includes a scripting language
  • Improved interface
  • Offers better optimization
  • Consumes less memory
  • High speed
  • Performs extensive documentation

Piriform Defraggler

This freeware defragmentation utility defragments individual files, groups of files (in a folder) or an entire disk partition, either on user’s command or automatically on a schedule. Defraggler supports NTFS and FAT32 file systems. The portable application can be used as a replacement for Windows inbuilt defragment tool since it is faster and offers some additional features too.

Simply select the volume you want to analyze, click on the volume name displayed on the interface and then click the ‘Analyze’ button. The program will analyze the disk volume and display results in seconds. Next step is to click the ‘Defrag’ button to initiate the defragmentation process.

Piriform Defraggler features:

  • Gives your hard drive a quick touch-up
  • Organizes empty disk space to prevent fragmentation
  • the software can be programmed to run daily, weekly or monthly
  • Windows OS and Multi-lingual support
  • Supports 37 major languages

Auslogics Disk Defrag

One of the best know in the free defrag software space is Auslogics Disk Defrag. This tool defragments and re-arranges files to ensure most efficient file placement. The program not only defragments files but optimizes your hard drives’ file system also to gain higher performance. It supports both FAT 16/32, and NTFS file systems.

Auslogics Disk Defrag’s  optimization algorithms allow you to defragment free space, move system files to the fastest part of the disk and clear the MFT Reserved Zone from regular files. Plus, the tool is supplied with a powerful engine that can easily defragment large multi-terabyte.

Auslogics Disk Defrag features:

  • Consolidation of free space
  • Efficient and smart placement
  • Single file or folder defragmentation
  • Lists fragmented files
  • Auto-defrag mode
  • Multiple languages support.

You also want to have a look at the new Auslogics Disk Defrag Touch for Windows 10/8/7.

Puran Defrag Free

The simple defragmentation utility collects all the fragments of a file and puts them together, thereby upgrading the hard disk performance. Its intelligent optimizer i.e. Puran Intelligent Optimizer (PIOZR) boosts the system’s speed.The program can be used in several distinct ways and includes some useful features and configurable options.

Puran Defrag is free for personal and non-commercial use only. If you’re using Puran Defrag in business, you must purchase a license.

Puran Defrag features:

  • Puran Intelligent Optimizer – PIOZR
  • Directories Consolidation for speed boost
  • Optimization by Freeing Space
  • Automatic Defragmentation for worry free defrag
  • Boot Time Defragmentation for system files like MFT
  • Low Priority Defrag for work
  • Individual File/Folder Defrag for selective defrag
  • GUI and Console Command Line Defrag Supported
  • Restart/Shutdown After Boot Time Defragmentation
  • File/Folder Exclusion or exclusion by wildcard facility
  • Native support for 64Bit Windows.

You may also want to check out Smart Defrag, which offers to also defragment Windows Store Modern UI Apps. There are others too like DiskTuna and SuperEasy Live Defrag as well that you may check out.

So which one’s your favorite? Or do you prefer to depend only on the in-built Windows Defragmentation Tool?

Posted by on , in Category Downloads with Tags
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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