The DEH file extension is for the Doom DeHackEd Game Data Format. This format consists of game modification data used by the DeHackEd editor software for the original Doom game. The DEH file format is no longer actively used and is considered obsolete.
The DeHackEd software that supports DEH files was created by Greg Lewis for MS-DOS to allow customization of Doom executables. The DEH file contains data used by the DeHackEd editor. This file format is deprecated and no longer supported.
DEH files are categorized as game files along with 1509 other similar file types. The DEH extension may not be supported by DeHackEd or other programs. Files named Doom DeHackEd Game Data Format are often modified or read in the DeHackEd editor.
Sometimes DEH files need to be quickly previewed. Generic file viewers may display DEH data differently than the DeHackEd editor. It’s best to use the editor dedicated to handling the DEH file extension.
Doom