List of defragmentation software
Encyclopedia

Commercial

  • Ashampoo Magical Defrag, by Ashampoo
    Ashampoo
    Ashampoo GmbH & Co. KG is an international computer software company based in Oldenburg, Germany. They are best known for Ashampoo Burning Studio and Ashampoo WinOptimizer. They are general members of the Blu-ray Disc Association and a member of the Intel Software Partner...

    , for Windows XP
    Windows XP
    Windows XP is an operating system produced by Microsoft for use on personal computers, including home and business desktops, laptops and media centers. First released to computer manufacturers on August 24, 2001, it is the second most popular version of Windows, based on installed user base...

    , Vista
    Windows Vista
    Windows Vista is an operating system released in several variations developed by Microsoft for use on personal computers, including home and business desktops, laptops, tablet PCs, and media center PCs...

    , and 7 (including 64-bit
    64-bit
    64-bit is a word size that defines certain classes of computer architecture, buses, memory and CPUs, and by extension the software that runs on them. 64-bit CPUs have existed in supercomputers since the 1970s and in RISC-based workstations and servers since the early 1990s...

     versions)
  • Disk Defragmenter, by Diskeeper Corporation
    Diskeeper Corporation
    Diskeeper Corporation is the name of a software company based in Burbank, California, founded in 1981. The company's current name is derived from its flagship product, Diskeeper, a file system defragmentation software package for Microsoft Windows and VAX...

     and Microsoft
    Microsoft
    Microsoft Corporation is an American public multinational corporation headquartered in Redmond, Washington, USA that develops, manufactures, licenses, and supports a wide range of products and services predominantly related to computing through its various product divisions...

    , included in most versions of Windows
    Microsoft Windows
    Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

  • Diskeeper
    Diskeeper
    -Further reading:#...

    , by Diskeeper Corporation, for Windows XP or higher
  • Norton SpeedDisk (a component of the Norton Utilities
    Norton Utilities
    Norton Utilities is a utility software suite designed to help analyze, configure, optimize and maintain the computer. The current version 15 of Norton Utilities Premier Edition for Windows XP/Vista/7 was released December 27, 2010....

     bundle), by Symantec
    Symantec
    Symantec Corporation is the largest maker of security software for computers. The company is headquartered in Mountain View, California, and is a Fortune 500 company and a member of the S&P 500 stock market index.-History:...

    , for DOS
    DOS
    DOS, short for "Disk Operating System", is an acronym for several closely related operating systems that dominated the IBM PC compatible market between 1981 and 1995, or until about 2000 if one includes the partially DOS-based Microsoft Windows versions 95, 98, and Millennium Edition.Related...

     and Windows
  • Norton SystemWorks
    Norton SystemWorks
    Norton SystemWorks is a discontinued system utility suite by Symantec. It expanded the tools found in Norton Utilities, and added other Symantec software titles, primarily anti-virus, and later backup software for the high-end versions.-Norton NT Tools:...

     (Speed-Disk), by Symantec, for HFS
    Hierarchical File System
    Hierarchical File System is a file system developed by Apple Inc. for use in computer systems running Mac OS. Originally designed for use on floppy and hard disks, it can also be found on read-only media such as CD-ROMs...

     (Mac OS X
    Mac OS X
    Mac OS X is a series of Unix-based operating systems and graphical user interfaces developed, marketed, and sold by Apple Inc. Since 2002, has been included with all new Macintosh computer systems...

    ) and HFS Plus
    HFS Plus
    HFS Plus or HFS+ is a file system developed by Apple Inc. to replace their Hierarchical File System as the primary file system used in Macintosh computers . It is also one of the formats used by the iPod digital music player...

  • O&O Defrag
    O&O Defrag
    O&O Defrag is a Windows defragmentation utility sold by German software developer O&O Software. It has won several awards by PC journals and magazines, and is certified by Microsoft for all its current NTFS-based operating systems, including Windows 2000, Server 2003, XP, Vista and 7...

    , by O&O Software, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
  • PerfectDisk
    PerfectDisk
    PerfectDisk is the name of separate but related defragmentation utilities for Windows and HP OpenVMS published by Raxco Software. It has won several awards from computer magazines, and is certified by Microsoft for all its current NTFS-based operating systems...

    , by Raxco Software, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
  • UltimateDefrag
    UltimateDefrag
    UltimateDefrag is a retail file-system defragmentation utility made by DiskTrix. A crippleware version of the program was formerly available as the UltimateDefrag Freeware Edition....

    , by Disktrix, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
  • Vopt
    Vopt
    Vopt is a Windows defragmentation utility sold by Golden Bow Systems. It is one of the oldest defragmentation products, and has supported MS-DOS and all versions of Microsoft Windows...

    , by GoldenBow, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)

Freeware

  • Contig
    Contig (defragmentation utility)
    Contig is a command line defragmentation utility for Windows currently owned by Microsoft subsidiary SysInternals.- Operation :Contig is designed to defragment individual files, or specified groups of files, and does not attempt to move files to the beginning of the partition...

    , by Windows Sysinternals, for Windows XP, Server 2003, and higher
  • Defraggler
    Defraggler
    Defraggler, developed by Piriform, is a free donationware defragmentation utility, which notably allows users to defragment individual files on their computer system. Defraggler runs on Microsoft Windows; it has support for all versions since Windows XP...

    , by Piriform, for Windows XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
  • DiskTune
    DiskTune
    DiskTune is a freeware defragmentation program for Windows XP, Server 2003, Vista, Server 2008, and 7 . It supports FAT16, FAT32 and NTFS file systems....

    , by DIY DataRecovery, for Windows XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
  • MyDefrag, by Jeroen Kessels, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
  • PageDefrag
    PageDefrag
    PageDefrag is a program, developed by Sysinternals , for Microsoft Windows that runs at start-up to defragment the virtual memory page file, the registry files and the Event Viewer's logs .Defragmenting these files may improve performance...

    , by Windows Sysinternals, for Windows XP (32-bit), Server 2003 (32-bit), and higher

Open source

  • JkDefrag
    JkDefrag
    MyDefrag is a freeware disk defragmenting utility for Windows. JkDefrag was developed by Jeroen Kessels from 2004. The major change between JkDefrag and MyDefrag is the inclusion of a scripting language. This permits control of all the algorithms and techniques used in MyDefrag...

    , by Jeroen Kessels (discontinued but still available; replaced by free but not open source MyDefrag)
  • UltraDefrag
    UltraDefrag
    UltraDefrag is an open-source disk defragmenting utility for Microsoft Windows. It is released under the GNU General Public License. The only other Windows-based defragmentation utility with a GNU GPL is JkDefrag ....

    , by Dmitri Arkhangelski, Justin Dearing, and Stefan Pendl, for Windows NT 4.0
    Windows NT 4.0
    Windows NT 4.0 is a preemptive, graphical and business-oriented operating system designed to work with either uniprocessor or symmetric multi-processor computers. It was the next release of Microsoft's Windows NT line of operating systems and was released to manufacturing on 31 July 1996...

    , 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
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