NT Disk Viewer allows users to display hard disk data by physical sectors and clusters (in hex code or ascii format). Sectors can be copied and exported to txt or bin files. The software supports FAT and NTFS file systems and works under Windows XP, Vista, 7, 8 and 10.

It's really useful for "low-level" disk investigation and verification of effectiveness of file and disk wiping programs. NT Disk Viewer designed for developers and technical specialist who needs access to physical sectors of hard drive.

Portable as it uses a single exe file, has a very simple, user-friendly interface.