__NOTOC__ The following is a comparison of notable file system defragmentation software:
Program Developer License Supported file systems Supported platforms GUI CLI Script Scheduler Boot time Auto defrag when idle Stable release Auslogics Disk Defrag Auslogics FAT16, FAT32, NTFS Windows XP and later AVG PC TuneUp AVG Technologies 2015 (v15.0.1001.238) (November 30, 2014) Contig Microsoft NTFS Windows XP and later;Windows Server 2003 and later 1.8 (July 4, 2016) Defraggler Piriform FAT32, NTFS, exFAT, ReFS Windows XP and later Drive Optimizer (formerly Disk Defragmenter) Microsoft FAT16, FAT32, NTFS, ReFS Windows 2000 and later;Windows 95 and later Same as Windows Diskeeper Condusiv Technologies FAT16, FAT32, NTFS Windows XP and later JkDefrag Jeroen Kessels FAT & NTFS Windows 2000, Windows XP, Windows Vista 3.36.0.2 / August 31, 2008 O&O Defrag O&O Software FAT16, FAT32, NTFS, exFAT, ReFS Windows NT 4.0, 2000, XP, Vista, 7, 8.x, 10, 11. Server 2003, 2008, 2012, 2016, 2019, 2022 PageDefrag Microsoft FAT16, FAT32, NTFS Windows 2000, XP PerfectDisk Raxco FAT16, FAT32, exFAT, NTFS, ReFS* and CSVFSWindows XP SP3 or higher (x86, x64), Windows 10, Windows Server 2003 SP1, Windows Server 2019PerfectDisk 14 Build 900 (2021) UltimateDefrag DiskTrix FAT32, NTFS Windows XP and later 6.1.2.0 (28 July 2021) UltraDefrag Dmitri Arkhangelski, Justin Dearing, Sayem Chaklader, Stefan Pendl (8.0+) / GNU GPL (7.1.x) FAT12, FAT16, FAT32, NTFS, exFAT, ReFS Windows NT 4.0 and later UltraDefrag documentation and UltraDefrag 5.0.4 handbook , Open source version discontinuedSourceForge comment citation Vopt GoldenBow (or DataTuna)which makes available Howard Barry Emerson's VOPT on their own site, at FAT32, NTFS Windows 2000 and later Program Developer License Supported file systems Supported platforms GUI CLI Script Scheduler Boot time Auto defrag when idle Stable release
Notes
References
External links The Big Windows 7 Defragmenter Test The Big Windows XP Defragmenter Test