ntfsresize is a free Unix utility that non-destructively resizes the NTFS filesystem used by Windows NT 4.0, 2000, XP, 2003, Vista, 7, 8, 10, and 11 typically on a hard-disk partition. All NTFS versions used by 32-bit and 64-bit Windows are supported. No defragmentation is required prior to resizing since version 1.11.2. ntfsresize is included in the ntfsprogs package, developed by the Linux-NTFS project. For those that don't have a Unix system installed, it is still possible to run ntfsresize by using one of the many Linux Live CDs.
Development ntfsresize is one of the utilities in the NTFS-3G project and is able to resize NTFS volumes. The upstream project is continuing to maintain and develop the utility; its source repository contains changes to ntfsresize and related NTFS utilities. In 2026, work on the following items was done: Fixes for and changes to documentation of ntfsresize.
ntfsresize features Full compatibility with all known NTFS versions from Windows NT 3.1 to Windows Vista Checks internal structures for errors Will work in various difficult situations: No defragmentation needed prior to use Supports both shrinking and expanding NTFS Supports resizing volumes with known bad sectors in them Will refuse to run under certain conditions: When the volume is flagged dirty, that is marked for Windows to run CHKDSK at boot. The switch will override this When Windows is hibernated on the partition
See also ntfsprogs
References
External links ntfsresize man ntfsresize homepage Download page at sourceforge