This is the software publisher’s description.

WinHex is a universal hexadecimal editor, particularly helpful in the realm of computer forensics, data recovery, low-level data processing, and IT security. An advanced tool for everyday and emergency use: inspect and edit all kinds of files, recover deleted files or lost data from hard drives with corrupt file systems or from digital camera cards. Key uses include:

Drive cloning, drive imaging to produce exact duplicates of disks/drives, e.g. to save the time for a full installation of the operating system and other software for several computers/disks of the same type, or to be able to restore a running installation in case of data loss/screwed up Windows (restoration of a backup). Also for computer forensics specialists, since they need to work on a copy when searching for evidence on the object disk. You can clone directly, or from an image file. Menu: Tools | Disk Tools | Clone Disk

Analysing files to determine the type of data recovered as lost cluster chains by ScanDisk or chkdsk.

Wiping confidential files or disks so no one (not even computer forensics specialists) will be able to retrieve them. To securely erase a file, use File Manager | Delete Irreversibly. For disk wiping, open the disk with the disk editor and use Edit | Fill Disk Sectors. E.g. fill with zero bytes (hexadecimal value 00) or random bytes.