6 Best Defrag Software For Windows

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What Is Defragmentation?

Defragmentation is a process reducing the degree of fragments of a particular file or whole disk.  This is done by locating the fragmented parts of a particular file and rearranging and restoring to make as few fragments as possible. Defragmentation overall reduces the time spent to access the file and enables efficient usage of the storage.

For instance, let’s say you deleted a 2GB video file from your hard drive. Now that block which held that 2GB file will get empty but the blocks beside it will still hold certain files.

When you try to add new files to your hard drive, in order to use the empty spaces, the empty spaces will be used and new files may be stored in parts. When you try a new file of, let’s say, 3GB, then 2GB of it will be stored in the empty blocks to make use of the space, and another 1GB will be stored somewhere else. This happens on a larger scale with hundreds and thousands of fragments which increases the time taken to locate the files.

For defragmentation, you can use the inbuilt Defrag tool, available on almost all versions of Windows OS, however, it is not recommended. The inbuilt defragger is slow, inaccurate, and inefficient. There are a lot of third-party options available on the web. So, to make things easier for you, here I have made a list of 6 of the best defrag software for Windows 10. Let’s check out each of them.

Best Defrag Software For Windows 10

ProductsAuto-defragEasy to useFree versionScheduler
Disk SpeedupYesYesYesYes
GlarySoft Disk SpeedupYes (only for the paid version)YesYesYes (only for the paid version)
Auslogics Disk DefragYesNoYesYes
Smart DefragYesYesYesYes
Wise Care 365NoNoYesNo

1. Systweak Disk Speedup

Disk speedup

It is one of the most recommended tools for defragmentation in Windows, taking into account that it takes up minimal space on the system. In addition, it manages to carry out this process in just a few clicks, so it turns out to be fast and has alternatives that allow you to organize the fragmented files consecutively.

Of course, you can also decode your hard drive manually. For example, you can use Windows 10’s built-in utility, Disk Cleanup. This tool scans your hard drive for junk files and then deletes them to free up space. Also, you can uninstall all the applications, programs, and games that you have not used in a long time. 

Additionally, it is safe software to check if the new data has been written correctly or not, before overwriting the old. It also has a function that manages to pause and stop the defragmentation process at any time, avoiding losing data. Finally, it gives you the facility to know for sure the status of your hard drive by accessing the information that is stored there and that may experience wear.

It includes a tool called Disk Doctor that will analyze the hard disk to find possible errors and fix them automatically. You can even schedule the software to defragment your computer at specified times.

It only takes a few seconds to analyze the disk and allows you to defragment a file or folder independently. It not only defragments the disk but also optimizes the files by placing the most used files in the fastest area of ​​the disk. 

Systweak Disk SpeedUp stands out because it is very simple and intuitive to use, translated into multiple languages. The interface is clear and clean, and it only takes two or three clicks to launch any option. If you are looking for a tool that works just the way you want and has a good UI, then this tool is just for you.

You can also configure this tool to automatically move large files to a different location on your hard drive to improve overall performance. Disk Speedup has a lot more handy options, but it doesn’t offer anything other than the defragmentation tools mentioned above. 


  • Comes with tools that can clean junk files, fix disk errors, and more
  • Simple and easy to use with an intuitive design. 
  • Good customer support
Intuitive UIMost extra features are limited to free users
Has many features beyond just disk defragNo real-time defragmentation option

2. Glarysoft Disk SpeedUp

Glarysoft Disk speedup

Here we have a classic among the classics. Glarysoft Disk SpeedUp has been offering us an excellent disk defragmenter for many years, which is also completely free.

Disk SpeedUp stands out because it is very simple and intuitive to use, translated into multiple languages. The interface is clear and clean, and it only takes two or three clicks to launch any option. SpeedUp detects all defragmented files in seconds and reorganizes files on our computer. The program will make it faster when opening a program, it also increases the speed when searching for files, shortens the system at startup, and improves performance.

It only takes a few seconds to analyze the disk and allows you to defragment a file or folder independently. It not only defragments the disk but also optimizes the files by placing the most used files in the fastest area of ​​the disk. And you can defragment automatically, scheduling the process.

If you are looking for a reliable free defragmenter, that works well, without disabled features, that is simple and intuitive to use and configure  Glarysoft Disk SpeedUp is one of the best disk defragmenters in 2020. It is also updated often (the last update is just over a month old).

It will optimize your disk without risking any damage to the files stored on your hard drive. You can schedule the software to defragment your computer at specified times, which is always a good feature to have.


  • Easy to use
  • Simple and powerful
  • Modern design Graphical User Interface (GUI)
  • multilingual support
  • Defrag schedule support
  • Reboot / shutdown after boot time defragmentation
Many options of configurations for the defragmentationYou cannot defragment removable devices
Defragmentation mode in moments of inactivityIt tries to install other irrelevant software into the PC
Files can be excluded from the process
Option to schedule defragmentation

3. Auslogics Disk Defrag

Auslogics disk defrag

This ideal software for Windows is considered a defragmentation tool with extremely beneficial features. This allows for defragments and rearranges files to ensure the most efficient placement of files. Auslogics Disk Defrag tool comes in two versions, as installable software, but also as a portable program that can be used on removable drives. 

The program not only defragments files but also optimizes your hard drive’s file system for better performance. It supports the FAT 16/32 and NTFS file systems.

In the first place, it takes care of carrying out this action in a short time, making the data on your PC’s hard drive more compact and more accessible after that. Auslogics Disk Defrag’s optimization algorithms allow you to defragment free space, move system files to the fastest part of the disk, and erase the MFT reserved area of ​​normal files. Furthermore, the tool comes with a powerful engine that can easily defragment large multi-terabytes.

In addition, the program shows multiple configuration options, exhibits a totally intuitive and simple-to-use interface, improves file systems, and supports scheduling defragmentation tasks whenever you want. It also consolidates free space and efficiently checks for drive errors, correcting them immediately, and it is faster than many other tools in this list.

Disk Defrag Free offers the typical options of specialized defragmenters: it places system files and the most used files in the fastest areas of the disk, allows you to select specific files to defragment (or never do it), it also defragments the free space, and can turn off the computer when finished.

It also includes a function that is not usual in free applications of this type: it defragments in real-time while you use your computer. Without a doubt, it is an option worth considering.


  • Error-fixing before defrag
  • Efficient and smart placement
  • Defragmentation of a single file or folder
  • List fragmented files
  • Auto defragmentation mode
  • Support for multiple languages.
Portable applicationAdvanced disk-defrag takes a lot of time
Advanced scheduling optionsVery limited features in the free version
Provides fragmentation reports and graphsNo special algorithms for SSDs
Can defrag disk automatically in the background

4. Defraggler


It is a small free tool from Piriform that can do a lot to improve the functioning of our PC. This program uses the same techniques as Windows to read and write files, therefore they will never be damaged on your computer. But it adds a number of interesting features, which can be very useful in certain situations. In addition, it manages to speed up the device by adjusting fragmented documents and organizing them more efficiently. As if that were not enough, Defraggler promises to free up more space on your entire PC’s hard drive and thus helps prevent fragmentation before it happens.

On the other hand, it displays a default configuration on its interface, where you will not have to do anything at all, thanks to the efficiency of the hardware. However, if you prefer to have the monitoring and control of the folders, drives, and files fragments yourself, this offers you completely flexible customization.

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

Its interface is very simple and intuitive, showing all the data in a graphical way so that it is as easy to understand as possible. An advantage of this application is that it allows you to defragment the entire hard drive at once, or choose specific files to finish earlier. It has more complete paid versions.


  • Both NTFS and FAT32 file systems are supported
  • Give your hard drive a quick touch-up
  • Organize empty disk space to avoid fragmentation
  • the software can be scheduled to run daily, weekly or monthly
  • Windows operating system and multilingual support
  • Supports 37 major languages
Supports checking a drive for errorsCan be pretty slow
Option for just or folder defrag No optimization feature
‘Quick defrag’ optionSmart Defrag 
Compact and portable 

5. Smart Defrag

Pros of Smart Defrag

It is a free tool that is compatible with all versions of Windows, which enshrines a very efficient defragmentation technology from which you will be able to fully optimize the access speed. As for its operation, Smart Defrag defragments the disk intelligently by using the file rationalization system based on the use of the files.

The main advantage of Smart Defrag is that you have the option to schedule automatic defragments, and you also have the option to perform a defragment when the computer is idle. Smart Defrag is also great for running a startup-time defragment to remove locked file fragments. Like Defraggler, Smart Defrag could also exclude certain files and folders from defragmenting or scanning.

Boot time defragmentation is a unique feature. Defragment selected drives at every boot to ensure faster performance. You can also configure it to defragment the page file, hibernate file, and master file table. 

It also has a “Game Optimization” feature that will allow you to defragment the specific games you play, allowing you to load them more quickly the next time you play them.

Smart Defrag has an effective Always On feature and does not interrupt other processes. It works silently in the background analyzing and keeping your computer fragment free. For its part, it adds the alternative of defragmenting native Windows applications, has a defragmentation action scheduler, and frees up available space on the device before the process, in order to increase system performance much more.

Smart Defrag allows users to adjust the size of its GUI interface by directly dragging the border to better fit their screen. Therefore, the interface can be tweaked according to your taste.

Smart Defrag is overall a powerful and must-have tool for any windows user. 


  • Game optimization feature
  • Scheduled optimization support
  • Reboot / shutdown after boot time defragmentation
  • Exclude certain files and folders from a defrag.
  • Available in more than 40 languages
Popup alertsMany features and exclusive for the pro version  
Fast optimizationNo option to check the drive for errors
Defragmentation visualsMay try to install irrelevant applications
Intuitive UIDoesn’t support idle defrags

6. Wise Care 365


Wise Care 365 is a software type All in One (AIO)  for maintaining and optimizing our Windows Operating System, which also includes the fastest scanning engine. It is a set of important applications to keep your PC at peak performance such as registry cleaner, disk cleaner, and other system utilities to keep your computer safe, clean, and fast. Furthermore, it is capable of detecting more hidden invalid registry problems than other similar programs, thus it will keep your PC in top condition and running at peak performance.

It speeds up PC performance, defragments disks and the Windows registry, and manages the startup process as well as services. Over time, your computer’s hard drive and registry will become clogged. It optimizes the system for the execution of heavy games and programs. Wise Care 365 can defragment your disk and registry so they are organized, making your computer run faster and more stable. 

Select a disk to defragment and then go to the options Defragment, Full Optimization, or Analyze. You can optionally shut down your computer once the defragmentation process has finished. Wise Care 365 does not have support for programmable defragmentation.

A portable option is also available for the tool.

One negative side of this tool is that many of its features and options are only available in the paid professional version. Wise Care 365 can be installed on 32-bit and 64-bit versions of all versions of the operating system from Windows 10 to Windows XP.


  • Prevent unauthorized use of personal applications.
  • Has an option for recovering lost files.
  • Can protect your privacy by deleting personal tracking data.
  • Hides your important files and folders.
Support for disk defragmentation and optimizationDoes not allow programmable defragmentation
Allows automatic shutdown at the end of the processIt does not allow defragmentation of locked files
Portable option availableMany features are for pro-only


What is the best free defrag program for Windows 10?

Disk speedup, Defraggler are free defrag programs for Windows 10 that you can try.

Does Windows 10 have a defrag program?

Yes.  Windows 10 comes with an inbuilt defrag program. In fact, in almost all Windows versions you can defrag your disk without any third-party application.

Does defragmentation speed up windows 10?

Yes. Defragmentation is one of the most basic ways to speed up Windows 10.

Is defragmentation bad for the hard drive?

It depends on what kind of hard drive you are using. In HDDs, defragging can improve data access performance. Whereas it can cause SSDs it can cause flash memory to wear out faster.

How can I speed up a slow computer?

You can first Defrag your hard drive, Clean up your hard disk, and delete the software you don’t use anymore. In addition, you can also try performance troubleshooting and tuning off visual effects. 

How to defrag drives manually?

In windows 10, you can just start by typing ‘Defragment and Optimize Drives’ in the search bar and open the tool. There, you can begin by clicking on the ‘Optimize’ option you see in the window.

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Satish Shah
Satish Shah

Member of Team Tech Countless: Tech Enthusiast, and Programmer

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