List of defragmentation software

The following is a list of notable file system defragmentation software.

Commercial

Disk Defragmenter, by Diskeeper Corporation and Microsoft, included in most versions of Windows
Vopt, by GoldenBow, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)

AVG Drive Defrag, a component of AVG PC TuneUp, by AVG Technologies, for Windows
Auslogics Disk Defrag, by Auslogics Software Pty. Ltd., for Windows XP, Server 2003, Vista, Server 2008, 7, 8, 8.1, and 10 (The program will defragment both 32- and 64-bit operating system versions)
Diskeeper, by Condusiv Technologies, for Windows XP or higher
Norton SpeedDisk, a component of the Norton Utilities and Norton SystemWorks bundles, by Symantec, for DOS, Windows and OS X
System Mechanic, by iolo technologies LLC for Windows – Defragmentation for files, registry, and file realignment both static and dynamic
O&O Defrag, by O&O Software, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
PerfectDisk, by Raxco Software, for Windows 2000, XP, Server 2003, Vista, Server 2008, Server 2012, 7 and 8 (including 64-bit versions)
UltimateDefrag, by Disktrix, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)

Contig, by Windows Sysinternals, for Windows XP, Server 2003, and higher^[1]
Defraggler, by Piriform, for Windows XP, Server 2003, Vista, Server 2008, 7, and 8 (including 64-bit versions)
DiskTune, 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) (support and website discontinued in October 2015 but still available)
PageDefrag, by Windows Sysinternals, for Windows XP (32-bit), Server 2003 (32-bit), and higher
SmartDefrag, by IObit, for Windows 2000, XP, Vista, 7 and 8
UltimateDefrag Freeware Edition, by DiskTrix, for Windows 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)

Btrfs, by Oracle Corporation, a Linux filesystem with built-in automatic or manual defragmentation
JkDefrag, by Jeroen Kessels (discontinued but still available; replaced by free but not open source MyDefrag)
UltraDefrag, by Dmitri Arkhangelski, Justin Dearing, and Stefan Pendl, for Windows NT 4.0, 2000, XP, Server 2003, Vista, Server 2008, and 7 (including 64-bit versions)
XFS, by SGI, a Unix and Linux filesystem with the filesystem reorganizer command xfs_fsr

↑ Russinovich, Mark (February 1, 2011). "Contig v1.6". Windows Sysinternals. Microsoft. Retrieved June 9, 2011.

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