.DM3 File Extension

File Type 1

DigitalMicrograph Image

Developer Gatan
Popularity
2.0  |  5 Votes
Category Raster Image Files
Format Binary

What is a DM3 file?

Raster image created by DigitalMicrograph, a application used for viewing and analyzing captured microscope images; stores the image and includes metadata such as the microscope's CCD camera properties, the exposure length, and a timestamp; uses a proprietary format.

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Programs that open DM3 files

Windows
ImageJ with DM3_Reader plug-in
Free
Mac
ImageJ with DM3_Reader plug-in
Free
Linux
ImageJ with DM3_Reader plug-in
Free
Updated April 23, 2012
File Type 2

Quake 3 Demo File

Developer id Software
Popularity
2.0  |  1 Vote
Category Game Files
Format Binary

What is a DM3 file?

Game demo created by the 1.11-1.16 point releases of Quake 3 Arena; contains a recording of gameplay that can be played back in the software by choosing Demos, selecting the DM3 file, and then clicking Play.

More Information

NOTE: The Quake 3 1.32 patch uses .DM_68 files for demos.

Programs that open DM3 files

Windows
Updated April 23, 2012
File Type 3

Diskette Manager 3 Disk Information

Developer Bloc Publishing
Popularity
2.0  |  1 Vote
Category Data Files
Format Text

What is a DM3 file?

A DM3 file is a disk information file created by Diskette Manager 3, an MS-DOS disk cataloging program. It specifies a disk's name, description, file list, and related metadata. Diskette Manager 3 places a DM3 file on each disk you catalog using the program.

More Information

Diskette Manager 3 is a program that allows users to catalog all their diskettes and floppy disks, as well as those disks' contents, in a single database. The program also allows users to print adhesive labels that detail each cataloged disk's contents. Users can apply these labels to their disks to make searching for a specific disk easier.

When a user catalogs a disk using Diskette Manager 3, the program places a DM3 file on that disk. Each disk's DM3 file includes all that disk's cataloged information, including the disk's name, contents, comments, date cataloged, type, and bytes used.

How to open a DM3 file

Because DM3 files are plain text files, you can open and edit them in any text editor, such as Microsoft Notepad (Windows), Apple TextEdit (Mac), or GitHub Atom (multiplatform).

Programs that open or reference DM3 files

Windows
Bloc Publishing Diskette Manager 3
Included with OS
Mac
Included with OS
Linux
Updated February 7, 2022

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