Ultradefrag screenshot

UltraDefrag is a Free disk defragmenter for Windows, which supports defragmentation of locked system files by running during the boot process. It can quickly boost performance of your computer and is easy to use...

It is easy to use without any complicated scripting or a huge load of configuration settings. You can filter the files processed by size, number of fragments, file name and path. You can terminate the process early by specifying an execution time limit.


Fast and efficient defragmentation algorithms.
Safe environment preventing files corruption.
Detailed file fragmentation reports.
Defragmentation of individual files/folders.
Defragmentation of locked system files.
Defragmentation of NTFS metafiles (including MFT) and streams.
Exclusion of files by path, size and number of fragments.
Fully configurable disk optimization.
Drive processing time limit.
Defragmentation of disks having the specified fragmentation level.
Automatic hibernation or shutdown after the job completion.
Multilingual graphical interface (over 60 languages available).
One click defragmentation via Windows Explorer's context menu.
Powerful command line interface.
Scheduled defragmentation (using Windows Task Scheduler).
Small size of installers (about 2 MB).
Availability of portable packages requiring no installation.
Full support of 64-bit editions of Windows.

UltraDefrag can defragment both FAT and NTFS disks with just a couple of restrictions:
It cannot defragment FAT directories, because their first clusters are immovable.
It cannot defragment master file tables (MFT), because their first 16 clusters are immovable.
However, the program optimizes those files placing their fragments close to each other behind the first one.

UltraDefrag can be used on Windows XP/Vista/7/8/10 as well as Windows Server 2003/2008/2012/2016.
Elder versions of the program (prior to v7) can be used on Windows NT 4.0 and Windows 2000 as well, with some limitations.
Additionally UltraDefrag for Linux exists which is an independent port of the program based on NTFS-3G capabilities.

Size: 2.28 MB