10 Best Free Disk Defragmenter Software For Windows 10, 8, 7

Your computer hard drive (internal or external) needs to be defragmented at regular intervals to ensure smooth and lag-free performance. Defragmentation is a process that optimizes the overall performance of your computer. For instance, it speeds up processes like opening big files or even reading them. Besides, it’s also known to clear up space on your hard drive.

Best Disk Defragmenter for Windows

Best Free Defragmenter for Windows 10

If you are looking for the best defragmenters for Windows 10 which are free then you can refer to our list below. Majority of them are freeware and only few are paid. Choose as per your requirement:


Defraggler Logo

Defraggler is a great defragmenter for Windows 10 that lets you shred all hard drives or the files (one by one). It belongs to popular software CCleaner. Compatible with HDD and SSD, it also works with NTFS and FAT32 file systems.


  • It works to make your PC speed faster by getting all the fragmented files together and arranging them expertly.
  • It reads and writes files in the same manner as Windows to ensure that your files are safe and secure.
  • It allows you to have complete control on your choice of files, folders and drives that you want to defrag. You can also choose to simply use the default settings and the rest is done by the tool.
  • It also has an option where you can set it to defrag daily, weekly, or monthly.

Also find – Best CCleaner Alternatives

Interesting Fact:

It helps defrag even the empty space on your drive along with your files, which means it helps stop defragmentation even before it takes place.

Get it here: https://www.ccleaner.com/defraggler
Price: Free and upgrade starts from $24.95

Disk Speedup (Systweak)

Disk Speedup

This fast and efficient tool comes loaded with an easy to use interface and collaborative dive map. It’s known for its automatic defrag feature that runs as per your schedule. As a bonus, it also comes equipped with customized presets.


  • It features a vibrant interface with large and noticeable tabs and buttons tagged as Defrag Show and Settings. These options offer all the basic functions making it easy for beginners and professionals alike.
  • Scans the entire disk in a matter of seconds.
  • Offers safe and secure defragmentation of disks while it also optimizes them with no damage caused the hard drive and the data stored in it.

Interesting Fact:

It also comes equipped with an optimization tool and is 100% clean of any malware, spyware, viruses, trojans, etc.

Get it here: https://www.glarysoft.com/disk-speedup/
Price: Free

Smart Defrag

Smart defrag

If you are looking for a defrag tool that offers fast and deep clean, then Smart Defrag could well be your answer. It works to optimize the hard drive and PC performance. It basically, speeds up your PC and the data access taking complete advantage of your SSD performance.


  • Offers improved multi-threading defrag tool and fast defrag speed that helps with quicker data access and extraordinary hard disk performance.
  • The Boot-time Defrag feature allows you to remove even those files from the HDD that are difficult to move when the system is running.
  • Offers improved game performance with Game Optimize feature.

Interesting Fact:

It comes equipped with an SSD Trim tool that automatically activates any system changes that would otherwise require prior experience to add.

Get it here: https://www.iobit.com/en/iobitsmartdefrag.php
Price: Freeware
File Size: 15.3 Mb

Auslogics Disk Defrag

Auslogics Logo

Known as one of the fastest and proficient defraggers in the category, Auslogics Disk Defrag is an easy to use program with some amazing options. Quick Defrag or Analyse are some of the features that make it a holistic program.


  • Features a super-fast engine that makes it among the fastest defraggers in the world.
  • Gathers all the fragmented files into a connecting space that helps prevent fragmentation of any new files created.
  • Creates a list of all the fragmented files that show which files are highly fragmented along with the destination of the individual fragment on the disk map.
  • Saves time by defragging only those files and folders you want to and not the complete hard drive.
  • Offers access to default settings that helps you to defrag in just a click. You can also customize the settings for any change in the operation or appearance.

Interesting Fact:

Proven safe and effective in various tests and therefore, trusted by computer manufacturers and liked by experts, worldwide.

Get it here: https://www.auslogics.com/en/software/disk-defrag/
Price: Free
File Size: 15.3 Mb (approx)

Puran Defrag

Puran Software Logo

Puran Defrag is a simple and easy to use defragmenter for Windows 10 that defrags the files and improves the system performance. It basically, speeds up your PC by gathering all the remains of a file and assembling them. At the same time, it shifts some of the most used files and all the directories to faster disk locations.

The overall intention of the tool is to optimize the disk performance thereby, boosting the PC speed. Best of all, it also cuts down the wear and tear of the hard disk thus, making it last longer.


  • Equipped with PIOZR (Puran Intelligent Optimizer).
  • Automatically defrags and optimizes the hard drive performance.
  • Maintenance wizard improves the computer speed for best performance.
  • Frees up space and optimizes performance.
  • Consolidates directories to optimize speed.
  • Performs boot time defragmentation for MFT files.
  • Automatically reboots or shuts down the system once Boot Time Defragmentation is complete.
  • Excludes files or folders using wildcard facility.

Interesting Fact:

Comes loaded with over 20 utilities for instant help and batch fix feature that automatically cleans your system improves performance and keeps it error-free.

Get it here: http://www.puransoftware.com/Puran-Defrag.html
Price: Free; upgrade available at $39.95

Toolwiz Smart Defrag

Toolwiz Smart Defrag

It’s a user-friendly software that scans the disk efficiently to eliminate fragments and therefore, optimizing the overall speed and performance of the system. With responsive options that are easy to handle by even beginners, Toolwiz Smart Defrag is one of the best disk fragmentation software in the category.


  • Requires minimal time for installation thus, easy setup.
  • Equipped with an easy to use user interface featuring a large window with a neat layout.
  • Allows you to choose from one or more partitions to add to the analysis operation once you have analyzed the amount of free space in the individual disk drive.
  • Displays the number of fragmented files and the total number of files for the next defragging step.

Interesting Fact:

Removes fragments from more than one disk drives concurrently optimizing the file reading speed and also the access speed.

Get it here: https://www.majorgeeks.com/files/details/toolwiz_smart_defrag.html
Price: Free

Ultimate Defrag

Ultimate Defrag

Ultimate Defrag helps increase the speed of your Hard Drive by 5 times for the certain file locations. Best of all, it also lets you customize the positioning of your files. It offers endless power and flexibility to the defragmentation process.

It, therefore, optimizes your PC by adding the files that are regularly used in the fastest sections of the hard drive, and external tracks. This helps the hard drive to perform at its best.


  • Offers more space on a hard drive.
  • Makes file reading performance 50% faster.
  • Reads the NTFS compressed files faster with 50% more space on SSD.
  • Offers greater flexibility when selecting files for compression based on filenames, folders, usage, etc.
  • Allows you to compress files while defragmentation is in process.
  • Smart Compress feature quickly analyses a file for compressibility without wasting time to compress those files that cannot be compressed.
  • Allows you to access compression functions from the Command Line Interface.

Interesting Fact:

Fresh methods of decrementing hard drive added, for instance, ability to split the drive into virtual zones.

Get it here: https://www.disktrix.com/
Price: Trial version available, Priced at $29.95


Ultradefrag Logo

Whether you are a beginner or a professional, UltraDefrag is designed for all. It comes loaded with all the basic and advanced options that are suitable for all.


  • Re-organizes the files on the disk helping the apps, games, and the operating system to perform at their best.
  • Defrags either single files or folders, or the complete disks, thus, allowing you to have full control on files you chose to defrag.
  • When the system is idle, it defrags the disks automatically to keep the system optimized at all times.
  • Easy to install and user-friendly portable version.
  • Comes equipped with smart algorithms.

Interesting Fact:

The software comes with a special mode where Windows boots to defragment any locked files.

Get it here: https://ultradefrag.net/en/index.shtml
Price: A Paid version


Mydefrag Logo

A free defragmentation tool for windows, MyDefrag is an extremely fast and easy to use program. It’s designed to defrag the disks while optimizing the system for best performance. Best of all, it’s safe to use even by beginners.


  • Comes loaded with plenty of optimization strategies.
  • Equipped with maximum possible data security.
  • Ability to defrag even external storage media.
  • Offers additional features like defragmentation planning, saving personal settings, etc.

Interesting Fact:

Option to select one or more disks straight from the main window since it displays size, label, and space (free/used).

Get it here: http://www.mydefrag.net/
Price: Free

O&O Defrag

O&O Defrag Logo

O&O Defrag is known to optimize your PC speed of up to 100% and along with improved performance. As a defragmenter, it arranges the file in a neat order allowing you to identify the required files easily.


  • The O&O Diskstat helps you to review the occupied space on the disk using Charts. It basically offers you a brief the complete hard disk as you start the program. It helps you to locate and discard redundant files, therefore, saving a lot of hard disk space.
  • The integrated disk cleaner identifies and deletes any junk files that may be clogging the memory and encouraging fragmentation.
  • Allows you to configure automatic defragmentation in just three clicks while increasing the disk space in the background without slowing down the PC performance.
  • Time view option that allows you to view the activity results.
  • Cuts down defragmentation time by 40%.
  • Automatically removes junk files to clear space.
  • Applies thin positioning for optimizing systems.

Interesting Fact

The DiskCleaner focuses on data security by not allowing the system to save copies of any private data in junk files.

Get it here: https://www.oo-software.com/en/
Price: Starts from $29.95 for a perpetual license.

So, these are the popular and well known



Founder and Writer @ WinOSBite. Future plan is to make this platform open to community to resolve and discuss various issues, usage related to Operating System.

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