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Auslogics Disk Defrag Free

Completely FREE - not just a demo or trial version.
Compact and fast defragmenter with over 11,000,000 users worldwide. It will improve your PC's performance by defragmenting and re-arranging files on your disk.
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No adware, no spyware, no toolbars
Compatible with
Win XP, Vista, 7, 8.1, 10
Latest ver. (12/27/2017)
File size: 11.6 Mb
Disk Defrag Free is a product of Auslogics, certified Microsoft® Gold Application Developer.
Microsoft confirms Auslogics' high expertise in developing quality software that meets the growing demands of PC users.

What does Disk Defrag Free do?

The problem: Your PC has slowed down and does not seem to run as efficiently as it used to. Simple, every day tasks such as opening files or programs seem to take noticeably longer for your PC to process, leaving you staring at your idle screen waiting to act.

The solution: At a click of a button Auslogics Disk Defrag Free will quickly defragment files on your hard drive, optimize file placement and consolidate free space to ensure the highest data access speed possible.

Why Disk Defrag Free?

  • Ultra-fast engine

    One of the fastest defraggers in the world, Disk Defrag often takes less than 10 minutes to defragment an average-size hard drive.

  • Absolutely FREE

    This program is totally free with no functionality or term limitations for either home or commercial use. Free regular updates included.

  • Works the way you want

    You can use the default settings for convenient one-click defrags or customize program operation and appearance to fit your needs.

  • Industry-acknowledged quality

    Exclusive Auslogics technology is proven safe and effective in multiple tests, used by PC manufacturers and recommended by experts.

Compare features:

Disk Defrag Free
  • Ultra-fast defrag-mentation engine
  • Thorough free space consolidation
  • Single file or folder defragmentation
  • Special algorithms for VSS-enabled drives
  • Disk error check and repair
  • Automatic defrags in real time
  • Customizable disk map appearance
* We used the standard defragmenter in Windows 7 and Windows 8 for comparison.

See how the program compares to Disk Defrag Pro

Awards and reviews

"We found Disk Defrag fast, even on older XP systems, it's interface couldn't be any easier to use."

More awards and reviews

Useful features you will love

  • Optimizes File System

    Places system files to the faster part of the disk, minimizing the time needed for the hard drive to access them.

  • Consolidates Free Space

    Merges scattered pieces of free space into a contiguous block, preventing fragmentation of newly created files.

  • Defragments Automatically

    You can set the program to auto-defrag when PC is in idle state to keep fragmentation in check at all times.

  • Defrags Single File or Folder

    Can save you time by defragmenting only the files or folders you want instead of the entire hard drive.

  • Smartly Places System Files

    The intelligent defrag algorithm places system files where they can be accessed faster for improved performance.

  • Keeps MFT Zone Clear

    The special area reserved for the Master File Table is kept clear of regular data files to prevent MFT fragmentation.

  • Lists Fragmented Files

    You can see which files are the most fragmented, as well as the location of each fragment on the disk map.

  • Offers Customization Options

    You can customize everything from the program's appearance to behavior and the way it handles files.

  • Powers Off PC After Defrag

    You can have the program shut down your PC after defragging, so you can launch it and go out or go to bed.

How to defrag the right way:

  • Don't waste time, disk space and resources defragmenting junk: use Auslogics BoostSpeed to clean out all junk files for free before defragmenting.
  • Large files broken up into large pieces have no ill effect on performance – set Disk Defrag to ignore large file fragments in Program Settings.
  • Use the Defrag & Optimize mode once a week for smart file placement and set the program to move system files to the faster part of the disk for best effect.
  • For best results, launch defragmentation when you are done using your computer for the day - simply set Disk Defrag to shut down PC after defrag.
  • Are you an IT pro? For more advanced features, such as boot-time defrags, multiple file placement options and a lot more, use Disk Defrag Pro.

Download Disk Defrag Free:

  • Full functionality, without any restrictions
  • Absolutely FREE for home and commercial use
  • Compatible with Win XP, Vista, 7, 8.1, 10
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File size:
11.6 Mb

Founded in 2008, Auslogics has built a strong reputation through its dedication to developing effective PC maintenance and optimization solutions.

The quality of its products is recognized by major IT industry players such as Intel and Microsoft and highly rated by the world-renowned IT experts. Together with our respected partners, among which you'll find such names as Sony Vaio, AVG and Bitdefender, we keep working hard to meet the ever increasing demands of Microsoft Windows users around the world.

Portable version

Download now File size: 5,4 Mb

Portable version is a single ".exe" application that doesn't require installation and can be run directly from a USB drive. Learn more >>

A word from our users

Dr Martin Rushbrooke

"I find this a first class program which totally fulfills my needs as a home user. Many thanks."

Jeanice Walters

"I've used it for 2 or 3 years and I love it. It is so much faster than Windows Disk Defragmenter."

Michael Sturgeon

"I love this application. I have used others that are quite costly and have not been as pleased with them as I am with your product."

David Baker

"The program works great. Have not had any problems. I do like how you can custom the program to meet my demands."

Liam Hoolahan

"The disk defrag is very simple in user interface, its speed and reliability are unbelievable, honest."

More testimonials

Need more information or help?

Contact us!

What is Auslogics Disk Defrag Portable?

It is a single ".exe" application that doesn't require installation and can be run directly from a USB drive. It may be handy, for instance, if you have no rights for installing software on your office PC. IT Pros who deal with hundreds of computers may also find this tool useful.

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Key benefits of Disk Defrag Portable:
  • No installation required.
  • Can be run directly from a USB drive or any other storage device.
  • Has all major Disk Defrag features, including disk optimization.
  • Extremely compact, easy to use and fast.
  • Absolutely FREE for home and commercial use.
Tech info:
Latest Version:
File size:
5,4 MB
OS Support:
Win 10, Win 8 (32 or 64 bit), Win 7 (32 or 64 bit),
Vista SP2 (32-bit only), XP SP3 (32-bit only)
Release Date:
June 20, 2017
You may also find our command line tool useful:

Auslogics Disk Defrag Free comes with a command line tool, "cdefrag.exe".
Please see this page for the full list of command line parameters.

BoostSpeed 10

Just Released!

Introducing brand-new Windows Slimmer tool, usability improvements and more. Give your PC's performance a boost today!

Download here

Have a license for an earlier BoostSpeed version? Upgrade on special terms from HERE.