.DMS File Extension

4 file types use the .dms file extension.

Amiga Disk Masher Image

Developer Commodore International
Popularity
2.8  |  58 Votes
 

What is a DMS file?

A DMS file is a compressed Amiga disk image created using Amiga's Disk Masher System (DMS). It contains data intended for use with an Amiga computer. DMS files were originally used to transfer data among Amiga users via physical floppy disks, but are now most often used to share Amiga games, programs, and other files online, for use with Amiga emulators such as Amiga Forever.

More Information

The Amiga was created by Commodore International and was one of the earliest PCs to support advanced graphics, sound, and video. Its superior multimedia capabilities made it quite popular among gamers, music enthusiasts, video producers, and other creatives. However, as other companies released computers and game consoles that matched or surpassed the Amiga's capabilities, the Amiga faded from the PC market.

How to open a DMS file

Many modern decompression programs do not support the DMS format, so you might have to download a program such as The Unarchiver (Mac) or WinFellow (Windows) if you want to view the files contained within a DMS archive.

To actually open and use the files contained within a DMS archive, you will have to download an Amiga emulator such as Amiga Forever.

Open over 400 file formats with File Viewer Plus.Free Download

Programs that open DMS files

Windows
Cloanto Amiga Forever
WinFellow
Free
WinUAE
Free
Mac
The Unarchiver
Free
Cloanto Amiga Forever
MaxUAE
Free

Dream Maker Script

Developer BYOND
Popularity
3.1  |  9 Votes
 

A DMS file may also be a script file (i.e. "connect.dms") run by Dream Seeker, a client for playing online games. It was created by Dream Maker, part of the BYOND (Build Your Own Net Dream) suite of programs.

Programs that open or reference DMS files

Windows
BYOND
Free
Mac
BYOND
Free
Linux
BYOND
Free

Renamed Downloaded File

Developer N/A
Popularity
3.3  |  6 Votes
 

A DMS file may also be a file that has been downloaded and renamed by the Apple Safari web browser or the Apple Mail email client. It contains the contents of a file that did not have a file extension or was erroneously renamed when downloaded. The .dms extension is a result of a bug in Safari and Mail.

More Information

You most likely will encounter this type of DMS file only if you download a file that does not have a file extension in macOS with Safari or Mail. In some cases, Safari or Mail may also replace a valid extension with .dms or may append the .dms extension onto a file extension. For example, sample.pdf may become sample.dms or sample.pdf.dms when downloaded with Safari or Mail.

The bug is specific to Macs and has been reported across multiple versions of Mac operating systems, with some issues dating back to the early 2000s. While Safari and Mail are the typical perpetrators, the .dms renaming may also occur with other web browsers and programs.

How to open a DMS file

To open a DMS file, rename the .dms extension with the appropriate extension for the file type. For example, if you know you downloaded an .XLSX file that was renamed with the .dms extension, click on the extension to highlight it and change it back to .xlsx. Then, you can open the file with a program that supports XLSX files.

Programs that open DMS files

Windows
Rename the .dms extension and open it with the appropriate program
Mac
Rename the .dms extension and open it with the appropriate program
Linux
Rename the .dms extension and open it with the appropriate program

Domino MIDI Sequence

Developer Takabo Soft
Popularity
3.5  |  2 Votes
 

A DMS file may also be a MIDI sequence created by Takabo Soft Domino, a free MIDI music editor. It contains binary data that defines the sequence's tracks, notes, timing, key signature, and metadata. DMS files are similar to .SMF and .MIDI files, except they can be opened only with Domino.

More Information

Screenshot of a .dms file in Domino
DMS file open in Domino

Domino allows amateur composers to create digital music by placing notes upon a piano roll. Each song a composer creates in Domino can consist of up to 16 tracks, allowing composers to create complex, multi-track songs. Composers can also adjust their songs' time and key signature, and they can add lyrics, comments, and cue points.

By default, Domino saves the songs that composers create as DMS files. From within Domino, composers can send the songs their DMS files contain to a MIDI device, or they can export the songs in the Standard MIDI (.SMF) format, for use with other MIDI programs and devices.

NOTE: Domino is a Japanese program, but a community-translated English version is available on GitHub.

How to open a DMS file

You can open a DMS file with Domino (Windows). To do so, select File → Open... from Domino's menu bar. Then, navigate to and open your DMS file.

How to convert a DMS file

You can use Domino to export the sequence a DMS file contains as an .SMF (Standard Midi) file:

  1. Open your DMS file in Domino.
  2. Select File → Export as SMF (MIDI) (M)....

Programs that open DMS files

Windows
Takabo Soft Domino
Free
Domino English Translation
Free

Verified by FileInfo.com

The FileInfo.com team has independently researched all file formats and software programs listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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