.MD File Extension

.MD File Extension

File Type 1

Markdown Documentation File

Developer John Gruber
Popularity
4.0  |  346 Votes
Category Developer Files
Format Text

What is an MD file?

An MD file is a text file created using one of several possible dialects of the Markdown language. It is saved in plain text format but includes inline symbols that define how to format the text (e.g. bold, indentations, headers, table formatting). MD files are designed for authoring plain text documentation that can be easily converted to HTML.

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Screenshot of a .md file in Caret
MD file open in Caret

MD files are not only useful for HTML documentation systems, but also for source code version control. This is because the files can be compared against historical revisions in human-readable text (whereas revisions to binary files cannot be compared easily). Projects created with GitHub, a popular online version control system, often use a file named README.md, which contains the readme for the project.

John Gruber, the developer of Markdown, has created a Perl program for converting Markdown to HTML. The program, called "Markdown," is available at the Daring Fireball website.

NOTE: Markdown files also use the .MARKDOWN extension.

How do I open an MD file?

You can open and edit an MD file in any text editor, including:

However, if you intend to edit an MD file, you may want to open it in a Markdown editor. Markdown editors provide editing and review tools that will help you apply Markdown syntax correctly. Some Markdown editors include:

  • ghostwriter (Windows, Linux)
  • MacDown (Mac)
  • Caret (cross-platform)
  • StackEdit (Web)
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Programs that open MD files

Windows
Included with OS
Included with OS
Free
Free Trial
Free
Mac
Included with OS
Free
Free
Free Trial
Free
Linux
Web
Free+
Chrome OS
Included with OS
Updated October 7, 2021
File Type 2

SEGA Mega Drive ROM

Developer N/A
Popularity
3.1  |  35 Votes
Category Game Files
Format Binary

What is an MD file?

Game ROM used by emulation software for the SEGA Mega Drive, an older game console (called the SEGA Genesis in North America); stores the contents of a game cartridge; used for running older games on the PC.

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NOTE: SBWin can be used to convert MD files to the .BIN SEGA game ROM format, which can be played by many different SEGA Master Drive/Genesis emulators.

Programs that open MD files

Windows
Free
Updated November 30, 2011
File Type 3

Machine Description File

Developer N/A
Popularity
3.2  |  21 Votes
Category Developer Files
Format Text

What is an MD file?

Programming file that contains an instruction pattern for each instruction that the target machine supports; referenced by the GNU Compiler Collection (GCC), commonly used for compiling programs on Unix systems.

Programs that open MD files

Updated August 18, 2010
File Type 4

MDCD Compressed Archive

Developer N/A
Popularity
3.0  |  17 Votes
Category Compressed Files
Format N/A

What is an MD file?

File or group of files compressed using MDCD compression

Programs that open MD files

Windows
mdcd10.arc
Updated 2006
File Type 5

Moneydance Financial Data File

Developer Reilly Technologies
Popularity
2.4  |  19 Votes
Category Data Files
Format N/A

What is an MD file?

Data file saved by Moneydance, a personal finance software program similar to Intuit Quicken or Microsoft Money; stores bank accounts, transactions, budgets, stock portfolios, and other information.

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Moneydance supports Mac, Windows, Linux, OS/2, Solaris, and Unix platforms.

Programs that open MD files

Updated June 6, 2009
File Type 6

Sharkport Saved Game File

Developer Sharkport
Popularity
2.5  |  16 Votes
Category Game Files
Format Binary

What is an MD file?

File created by Sharkport, a hardware accessory for the PlayStation 2; contains a PS2 saved game created by the Sharkport device; used for copying saved games to the PC and sharing them with other players; can be converted to other saved game formats, such as .PSU, using the PS2 Save Builder.

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NOTE: Sharkport also now uses the .PS2 extension for saved games.

Programs that open MD files

Windows
Updated July 20, 2011
File Type 7

MuseData Musical Score

Developer Walter B. Hewlett
Popularity
3.0  |  4 Votes
Category Text Files
Format Text

What is an MD file?

An MD file is a MuseData musical score. It contains plain text code that represents a piece of music, as well as metadata describing that work. While MD files are no longer widely used, you can still open them and use them to create sheet music in MuseScore.

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Screenshot of a .md file in MuseScore
MD file open in MuseScore

In 1983, developer Walter B. Hewlett created the MuseData music notation file format. According to Hewlett, the purpose of MuseData (MD) files was "to represent the logical content of musical scores in a software-neutral fashion." To do this, Hewlett developed a format that used plain text notation to represent the measures, notes, rests, and emphases included in a piece of music. MD files also include a plain text header that contains general information about the file, such as when the file was created, what musical score, movement, or part it represents, and what instruments should be used to play the piece.

As digital music notation developed further, MD files largely became obsolete. However, many MD files are still available online, and you can still open MD files and use them to create sheet music in MuseScore, a free music composition and notation program.

How do I open an MD file?

You can open an MD file in MuseScore. To do so, select File → Open from the program's menu bar, and then locate and open your MD file. Note that you may receive an error message saying your MD file is corrupted. If you do, click Ignore. The MD file will appear in MuseScore as a musical score.

If you need only to see the plain text notation that an MD file contains, you can open it in any text editor, such as Microsoft Notepad, Apple TextEdit, or Github Atom.

Programs that open MD files

Windows
Mac
Linux
Updated November 11, 2020

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