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Screenshot of Undisker 2021
Undisker 2021
Developer(s)Undisker Technologies.
Initial releaseNovember 10, 1995; 25 years ago (1995-11-10)[1]
Stable release
2021 / March 11, 2021 (2021-03-11)
Operating systemMicrosoft Windows
TypeData recovery, Computer Forensics

Undisker is one of oldest [2] [3] [4]disk image tools for Microsoft Windows for data recovery and computer forensics purposes.


  • Captures disk image from any storage media
  • Converts supported image formats to raw or native UDSK format

Supported File formats

Supported file systems

Optical media formats

  • Captures images from CD/DVD/BD media (including multi-session disks)
  • Supports ISO 9660 format (also known as ISO image) and file systems with Joliet extension.
  • Supports UDF disc format and file system
  • Supports NRG images (native format of Nero Burning ROM)

Beta as tradition

The latest public version (Undisker 2021) is officially declared as beta for historical reasons to celebrate the 25th anniversary of the very first version[5]

UDSK format

Undisker uses a proprietary format called UDSK. The format is proposed as universal disk image format, independent from storage type and with various compression support. The file format specification is available publicly as Knowledge Base article on Undisker website.[6]

See also

  • List of data recovery software


External links

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