Best Defrag Software for Windows
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What is Defrag Software for Windows?
Defrag software optimizes the arrangement of files on a hard disk drive (HDD) to improve read and write speeds. By reorganizing fragmented data into contiguous blocks, it reduces seek time and enhances overall system performance. Many modern defrag tools also include scheduling, SSD optimization modes, and disk health monitoring. While SSDs don’t require traditional defragmentation, defrag software can still perform trimming and optimization tasks for them. These tools are especially valuable for extending the life of HDDs, speeding up boot times, and improving file access efficiency. Compare and read user reviews of the best Defrag software for Windows currently available using the table below. This list is updated regularly.
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1
Wise Memory Optimizer
WiseCleaner
The best free Windows memory optimization tool. Free up memory, defrag memory, and empty standby memory with one click. Most PC users have known and unknown applications running in the background that take up your computer’s physical memory and thereby affect its performance. And, some applications will not release memory after the close. Wise Memory Optimizer helps you optimize physical memory to boost PC performance. Free up the memory taken up by some useless applications. Empty Standby memory (cached memory) to increase the free memory. Wise Memory Optimizer automatically calculates and displays the In Use, Available and total memory of your computer upon deployment, along with a pie chart. You can learn your PC memory usage at a glance. Single-click the "Optimize Now" button, the program can free up memory in several seconds. This intuitive user interface makes it really easy to use for both novices and experts alike.Starting Price: Free -
2
CleanGenius
EaseUS
If you are struggling with computer error after computer error, it can be enormously frustrating. If you are tired of the sluggish computer operation and slow load times, we recommend EaseUS CleanGenius to help you. This powerful PC booster provides an all-around and easy-to-use solution for Windows users to speed up PC, optimize & repair OS, free up disk space, etc. with only 1 click. Quick scan your computer OS to detect the problems. Deep scan your computer to help you understand more about your system problems as well as broken or invalid files. Clean, repair and optimize your computer system with just 1 click. Locate and remove cloned files, empty files, files of large sizes, or recently modified files. Unlock files or folders locked by system or other programs and help to rename, move or delete locked resources. Keep your registry defragmented and fix registry errors. Quickly clear junk files, useless shortcuts, unwanted files or software etc.Starting Price: Free -
3
Auslogics Disk Defrag
Auslogics
One of the fastest defraggers in the world, Disk Defrag often takes less than 10 minutes to defragment an average-size hard drive. Merges scattered pieces of free space into a contiguous block, preventing fragmentation of newly created files. You can see which files are the most fragmented, as well as the location of each fragment on the disk map. Can save you time by defragmenting only the files or folders you want instead of the entire hard drive. You can use the default settings for convenient one-click defrags or customize program operation and appearance to fit your needs. Exclusive Auslogics technology is proven safe and effective in multiple tests, used by PC manufacturers, and recommended by experts. Auslogics software is recognized by leading IT magazines and online resources. Recommended by experts as one of the fastest and most efficient defraggers.Starting Price: $39.95 per year -
4
Auslogics Disk Defrag Ultimate
Auslogics
Get your drives optimized for top speed and maximum efficiency with this powerful program's smart algorithms and boot-time defrag technology. You may be experiencing longer application startup times or a general slowdown and believe disk fragmentation may be behind it. You want more than just a simple defrag to ensure your drives' optimal performance. Disk Defrag Ultimate lets you defrag files that are inaccessible during system operation, as well as optimize file placement on your hard drive to ensure faster access and the most efficient operation. The multiple scheduling options let you easily maintain consistently high HDD speed. The smart algorithms and multiple scheduling options let you customize your defrags to match your PC usage style and requirements. Exclusive Auslogics technology is proven safe and effective in multiple tests, used by PC manufacturers, and recommended by experts.Starting Price: $39.95 per year -
5
Diskeeper
Condusiv Technologies
Diskeeper® is the #1 utility for keeping Windows servers and PCs running faster than new. Trusted by millions, Diskeeper prevents fragmentation & caches hot reads from idle, available DRAM for blazing performance! Everyone knows the frustration of a Windows system becoming progressively slower the longer it is used and burdened with more software and data. Condusiv’s Diskeeper with DRAM caching guarantees to fix worst performing physical servers or PCs with faster than new performance. Instead of "defragging," Diskeeper 18's patented engine ensures large, clean contiguous writes from Windows in real-time so fragmentation is no longer an issue for HDDs or SSDs. This eliminates the "death by a thousand cuts" scenario of small, tiny writes and reads that rob SSD and HDD performance. Diskeeper 18 electrifies Windows system performance to operate faster than new with the addition of dynamic memory caching - using idle, available DRAM to serve hot reads.Starting Price: $49.95/perpetual license -
6
iolo System Mechanic
iolo
More than your average PC tune-up software. Speed up, secure, and simplify your digital life with iolo’s all-in-one Windows® optimization, antivirus, and online privacy software suite. Millions of people around the world have already made System Mechanic their go-to PC tune-up software for speed, repair, and automated maintenance. Read our press reviews. Deletes junk files that cause sluggishness and system instability. Boosts performance in real time for gaming, streaming, and downloading. Removes system-hogging bloatware you didn’t know was there. Frees trapped memory and defragments drives for even more speed. Helps secure open router ports and connected home devices. Automatically cleans and repairs whenever your PC is idle.Starting Price: $39.95 -
7
SQL Defrag Manager
IDERA, an Idera, Inc. company
Automatically find and fix database index fragmentation. Database administrators for SQL Server need to maintain the high availability and performance of their databases. Key areas that dramatically affect the performance of SQL Server are indexes that are fragmented and out of cluster. SQL Defrag Manager is a unique solution for defragmenting indexes for SQL Server. It automates the time-consuming process of finding fragmented indexes based on policies for the targeted databases.Starting Price: $1,196 per instance -
8
PerfectDisk
Raxco Software
PerfectDisk's OptiWrite technology prevents most fragmentation on your drive before it occurs, which prevents your system from slowing down. OptiWrite detects when Windows is going to fragment files and intelligently redirects I/O to stop the fragmentation from occuring. System performance is maintained and the need to utilize CPU and Disk I/O resources to defragment files is greatly reduced. Because less defragmentation is needed, there is a direct benefit in the form of energy saved in both CPU usage and in the reading and writing to a disk. It saves users both in energy costs and in the time required to defragment a file system. PerfectDisk's Space Management recovers disk space by detecting and removing duplicate files such as text documents, pictures, music, and videos. Recycler purges the Recycle bin and removes temporary files so that your drive remains clutter free. With Space Reports you can view a graphical and statistical report of file usage and allocation.Starting Price: $53.34 per year -
9
O&O Defrag
O&O Software
Up to 100% increased PC speed: There is nothing worse than when you want to do something on your PC and your computer is running slow. A disk defragmenter used regularly can speed up a PC of any age and get it working like new again! Don’t let a slow computer spoil your work or fun! Let O&O Defrag optimize your hard disks and – New! – SSDs and you can experience speed increases of up to 100%! Regular disk defragmentation optimizes your PC performance! When you defragment, the files that Windows splits up when saving documents across the hard disk or SSD are put back in order again so that files can be quickly recognized and found by the SSD or the read and write heads inside your HDD. Speed increases of up to 100% are not uncommon, and your hardware suffers much less wear and tear! Many new things have been added to the O&O Defrag engine that make using it, especially under Windows 10, even better.Starting Price: $29.95 one-time payment -
10
IObit Smart Defrag
IObit
Disk fragmentation is the main cause of slow computers. With an enhanced multi-threading defrag engine and improved defrag speed, Smart Defrag provides a better solution for faster data access and outstanding disk performance. Then you can enjoy faster game launching speed, copy files in half the time, etc. As your computer gets older, it takes longer to start up your computer to begin to work. Smart Defrag helps fix this problem easily. Configuring Boot Time Defrag feature, those files on HDD that cannot be moved while the system is running can be quickly defragmented for faster startup. Nobody wants to experience long game load time. Game Optimizer in Smart Defrag can optimize your game experience quickly with an ultra-fast engine, and all you need to do is select the game you’d like to defrag. Smart Defrag helps speed up PC and data access speed. And now it gets even better with all the new updates available.Starting Price: $19.99 one-time payment -
11
Wise Care 365
WiseCleaner
Free to clean up disk and fix registry problems on your PC. Protect your privacy and make your PC more secure. Provide a better solution for optimizing and accelerating your computer! Take prompt action once some applications attempt to make modifications without your permission. This protector will identify and stop any processes that try to secretly change the Windows registry. Wise Care 365 is definitely the preferred option for billions of Windows users who want to keep their Windows PC at peak performance. Speed up a slow computer and free up more valuable hard disk space in seconds. Over time, your computer’s hard disk drive and registry will become cluttered. Wise Care 365 can defrag the drive and registry to make them organized, thus making your computer run faster and more stable. You are going to be amazed by its blazing defrag speed. It optimizes PC's performance, defrags disks and the Windows registry, and manages the startup process as well as services.Starting Price: $29.96 one-time payment -
12
JetDrive
Abelssoft
JetDrive recognizes errors in your hard drives and can even detect and fix errors automatically if you prefer. Do you still remember the feeling when you bought your PC and everything ran so quickly? With JetDrive you can regain this lost speed. There is a physical reason why your PC slows down with time. JetDrive defragments your drive and restores it to an optimal state. Defragments are also your Registry thanks to our special registry defragmentation algorithm. Select which drive you want to defragment. A memory overview shows you how much memory capacity is still free or occupied. JetDrive of Abelssoft fixes the problem, defragments the computer, and optimizes the performance noticeably. In the classic hard disks, files are stored by magnetic fields, sector by sector. When a file is deleted, there is a gap. If the next file stored is not exactly in the size of this gap, it might result in an issue.Starting Price: €29.90 one-time payment -
13
Wise Registry Cleaner
WiseCleaner
Clean registry junks, repair Windows registry errors, defragment Windows registry, and keep your PC at peak performance. This new feature is ideal for computers that are used by more than one person, such as home computers that are shared by a family and public computers in public places. People who have administrative rights can easily scan and clean all users' registries at once. You do not need to log in under each individual account to scan & fix registry issues. The registry keeps growing when you use Windows, and so does the obsolete items in the registry, which would eventually lead to performance degradation and even system crash. Wise Registry Cleaner scans the Windows registry and finds errors & residual items in the registry and then cleans or defrags them. By fixing these residual and corrupted items in the Windows registry, your system will run faster and more stable.Starting Price: $29.95 one-time payment -
14
Eusing Cleaner
Eusing Software
Eusing Cleaner is a free system optimization and privacy cleaner tool. It allows you to find and remove the unused files in your system, invalid registry entries, delete your internet history and provides plug-in support to clean the history for over 150 third-party applications. You can select the items that you want to be cleaned and also specify cookies that should not be deleted. With simply one click, Eusing Cleaner can erase the cache, cookies, history, typed URLs, autocomplete memory, index.dat from your browsers, and Window's temp folder, run history, search history, recycle bin, and recent documents, etc. It also includes an option to overwrite deleted data multiple times, so it cannot be easily recovered. Additionally, it contains a fully featured registry cleaner. It will scan your Windows registry for invalid or obsolete information and provide a list of the errors found. After fixing the invalid entries, your system will be more stable and run faster.Starting Price: Free -
15
Registry Life
ChemTable
The system registry is one of the most important components of the operating system. The stability of the system's operation depends upon it being in working order, and the speed of the applications you work with depends upon the volume of data contained in it. Registry Life helps correct errors in the registry and optimizes it. It's a compact, simple to use, and free solution for servicing your system registry. Registry Life offers a handy tool to clean and repair the registry. With this tool, you can run checks on the registry to detect more than ten different kinds of problems. At the same time, this tool deletes informational junk from the registry. Registry Life is a utility to defragment and compress the registry. The program optimizes the registry quickly and efficiently and displays results of this operation visually.Starting Price: Free -
16
Auslogics Registry Defrag
Auslogics
Auslogics Registry Defrag is recommended by experts as a powerful free registry defragmenter. When you open it, you will find a simple intuitive interface that will guide you through the defragmentation process. You simply click a few buttons and the app does the rest. Auslogics Registry Defrag scans through the registry to find gaps and unused entries. Then, it reorganizes it, removing any fragmentation to improve speed and performance. And that’s it! Then, you can enjoy your Windows PC experience without worrying about the registry. Registry defragmentation can be performed not only as a quick fix for glitches, but also as a part of your regular system maintenance. Editing the registry manually isn’t recommended unless you’re an expert, since one small move can seriously damage your whole system. However, this tool makes registry defragmentation accessible to everyone. Auslogics Registry Defrag is time-tested and completely safe to use.Starting Price: Free -
17
Panda Security Cleanup
Panda
Panda Cleanup cleans and speeds up your Windows devices, extending their useful life and improving performance. Speed up your Windows device and free up hard disk space by deleting unnecessary files. Delete temporary files and clear your browser's history. Delete cookies (Chrome, Firefox, Edge, and Internet Explorer). Clean up the Windows registry. Defragment the hard disk. Some programs and applications are configured to run automatically whenever you start your PC. This may slow down your computer. With Panda Cleanup, you'll be able to see which programs are configured to run at startup and disable them if you don't think they are necessary. Additionally, Panda Cleanup will warn you every time a program installs as part of your computer's startup sequence so you can keep the boot process always optimized. Panda Cleanup will delete any corrupted or unnecessary registry keys that may cause operating system errors.Starting Price: $17.93 per year -
18
MyDefrag
MyDefrag
MyDefrag is a free defragmentation program for all Windows systems starting from Windows 2000. MyDefragGUI is the graphical user interface for the comfortable handling of this program. MyDefrag defragments very fast, has several optimization strategies, offers the highest possible data security, and can also defragment external storage media. However, you can input options only by a script grammar. With MyDefragGUI the operation becomes very easy. Beyond that, it has some additional functions e.g. planning the defragmentation, storing the personal settings, and configuring the screensaver. Runs under Windows 2000/XP/Server 2003/MCE/Vista/X64/Server 2008/7. MyDefrag has to scan all the files on the disk to determine if they are fragmented and where they are. At the moment it has to use very inefficient Microsoft function calls, in the future I hope to speed this up by directly reading the MFT and FAT.Starting Price: Free -
19
Puran Defrag
Puran Software
The files saved on your hard disk will become fragmented for various reasons. Because of this, your hard disk is extra busy gathering data from different fragments located at various locations on the hard disk in order to access your files. This process degrades your hard disk performance and overall system speed which gets gradually worse over time. In addition, the read/write speed of your hard disk varies by location and the files on your hard disk are randomly distributed. Therefore, you lose any potential speed gains from other system optimization programs. Puran Defrag provides the solution! Puran Defrag is a very simple disk defragmenter that will defrag the files and optimize your system, collecting all the fragments of a file and putting them together, as well as moving some frequently used files and all directories to faster disk areas. This process boosts your hard disk performance and thus overall system speed.Starting Price: Free -
20
Puran Registry Defrag
Puran Software
Puran Registry Defrag is a free utility to defrag and compact Windows registry for better computer performance. Scan and defrag Windows registry. Scan registry results with estimated registry size reduction. It can also be scheduled if used with Puran Utilities Batch Fix. Puran Registry Defrag is compatible with Windows XP/2003/Vista/2008/7/8 including 64-bit versions. It provides native support for 64-bit versions.Starting Price: Free -
21
WinContig
WinContig
Specifically designed to defragment single files or entire folders without the need to defragment the whole disk. WinContig is an easy-to-use stand-alone defragmentation tool that doesn't create any installation directories or Registry entries on your computer. Its purpose is to quickly defragment files without the need to defragment the whole disk. WinContig supports FAT32 and NTFS file systems and it works with Hard Disks and SSDs. Most defragmentation programs perform general defragmentation of an entire partition. In a real-life scenario, you often want to defragment a single file or a directory, for example, to improve the loading speed of a program file, or to reduce the loading time of a certain disk-intensive application like a game. WinContig has been designed specifically to meet the needs of users who focus mainly on files and folders rather than an entire disk. Its ability to filter files by several criteria.Starting Price: Free -
22
ShieldApps PC Cleaning Utility
ShieldApps
PC Cleaning Utility is a system cleaner that makes cleaning your computer a safe and simple process. Over time a computer becomes full of files that eventually clog the hard drive. PC Cleaning Utility cleans files that could be causing your computer to perform at a substandard level. By cleaning up such files, PC Cleaning Utility will help reduce system crashes and freezes. With PC Cleaning Utility you can choose which areas on your computer to scan and clean. Choose from virtual devices, libraries, installations strings, junk files, temporary files, system software, history, start menu, and more. By cleaning up potentially-problematic files, PC Cleaning Utility minimizes the chance of a computer freeze or crash caused by such files. Use PC Cleaning Utility to defragment a computer’s registry, as over time a computer’s registry becomes fragmented when files are constantly deleted causing performance to decline.Starting Price: $39.99 one-time payment -
23
Systweak Advanced System Optimizer
Systweak Software
Advanced System Optimizer is the most powerful cleanup and optimization software for Windows. It delivers an affordable, easy-to-use solution for all your Windows optimization needs. Clean your computer’s hard drive and make Windows much faster. Removing junk and obsolete files from your storage boosts PC speed with faster response and load time. Remove unwanted clutter and junk files from your PC for optimized system resources. Defragment your hard drive for better data allocation and read speed. Protect your privacy by deleting browsing history and cookies, encrypt your important files from prying eyes and delete data permanently! Keep Windows PC working like new with Advanced System Optimizer. It comes with in-built utilities to maintain and optimize your computer with ease. Backup important files such as videos, audio files, photographs and documents alongside recovery of lost data, regardless of whether it was deleted or formatted.Starting Price: $47.78 per year -
24
Glarysoft Disk SpeedUp
Glarysoft
Colorful interface with large, clearly labeled buttons and tabs labeled Defrag Show and Settings, which offers all basic functions, so it is very easy to operate for both novices and pros. It takes just a few seconds to scan your whole disk. In addition, with more advanced settings to meet advanced requests, it is intelligent. It is designed in such a way that defragments and optimizes disk safely, without any damage to your hard drive and the data stored on it. Disk SpeedUp features a nicely designed interface and is very easy to use. The program works with all main file systems and has support for scheduled scans as well. And besides the basic defrag functionality, Disk SpeedUp also includes an optimization tool, which is slower, but offers better results. Fast and efficient, user-friendly interface and interactive drive map. Defrag automatically and intelligently. Run as you scheduled, customized presets. -
25
10 Optimizer
10 Optimizer
An all-in-one tool for PC optimization and maintenance. The system scanner scans your PC thoroughly so you can fix everything. Optimize advanced system settings and application processes to boost overall performance and keep your PC at its very best! Increase your PC's Boot speed. Disable unwanted programs from starting with Windows for faster computer startup. 10 Optimizer has a user-friendly interface allowing beginners and experts to scan & fix their computer with ease. Unlock your PC's true potential with a range of tools built into one application. By using 10 Optimizer your PC will be more responsive, faster and cleaner. Easily repair Registry items, clean useless junk, defragment registry, instantly boost PC and increase internet speed. Increase your PC speed by stopping unwanted Applications and services running in the background with instant system booster.Starting Price: $23.95 per PC per year -
26
PassMark Fragger
PassMark
PassMark Fragger is a software tool that lets you fragment or defragments existing files in a controlled environment using user-selected settings. This utility is primarily used to benchmark the performance of third-party defragmentation tools or benchmark PC performance degradation due to file fragmentation. This software is unique to PassMark and is a world-first for fragmentation tools. A fragment or defragment of individual files. Control the number and size of fragments. Control the position of fragments on the disk. Fragment existing files without using additional free space. Graphically view the current fragmentation of a file. View detailed information about individual files. View cluster and cluster allocation information about the current volume. Output ranges of free and used disk clusters in the current volume to a text file. Fragger includes a built-in, searchable help file and an uninstaller.Starting Price: $27 one-time payment -
27
UltimateDefrag
Disktrix
A brand new version, more powerful than ever, for hard drive performance faster than ever so you can continue to experience a Windows® PC where everything just happens faster! We're pleased to announce the new Version 6 of the single most powerful defragmentation and hard drive optimization software on planet earth, UltimateDefrag. You now have more power and flexibility than ever before for keeping your hard drive not only defragmented but also optimized for the absolute maximum performance possible. All other defragmentation software only defragments, which is only part of the hard drive performance degradation equation, the other two more important causative factors are "where" on the drive your files are and how "scattered" your files are relative to each other. UltimateDefrag is the only software product that addresses all three causes of reduced hard drive performance to make your Windows PC, as well as all your favorite games and applications, perform at maximum performance. -
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UltraDefrag
UltraDefrag
UltraDefrag 9 reassembles fragmented files on your disks. This significantly speeds up your disks. As a result, the operating system, applications, and games perform much better. You get much faster computer startup and shutdown, faster web browsing, higher FPS in gaming, and much more responsive desktop applications. UltraDefrag 9 features an intuitive graphical interface. Now everything can be done with just a few clicks, without a single line of code! UltraDefrag 9 features one-click defragmentation of individual files and folders. Just select them in Windows Explorer, click the right mouse button, and select Defragment with UltraDefrag to quickly defragment them all. NTFS metafiles and data streams are crucial components of the file system and their fragmentation slows down pretty much everything. Whenever you defragment and optimize your disks UltraDefrag 9 defragments all the metafiles and data streams to keep your file system running at peak performance!Starting Price: $12.48 one-time payment -
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Systweak Disk Speedup
Systweak Software
Disk Speedup is a disk defragmenter tool that defrags your storage disks to boost the slow performance of your Windows PC and improve response time. Disk Speedup is a junk cleaner that proficiently finds and deletes junk and temporary files to recover tons of free space on your computer. Scans and deletes duplicate files to recover storage space and organize your data in a more efficient manner with no junk files. Disk Speedup comes with inbuilt Disk doctor to scan and fix hard drive errors and system files to ensure smooth PC performance.
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