File Extension Library

.MD File Extension

  • Developer by: John Gruber
  • Category: Developer Files
  • Format: Text

What is an .MD file?

.MD file extension is created by John Gruber. .MD has been classified as Developer Files. The format of .MD file is Text.

.MD is Markdown Documentation 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 text 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.

MD file open in Microsoft Notepad

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 a binary format cannot be easily compared). Projects created with GitHub, a popular online version control system, often use a file named, 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 used the .MARKDOWN extension.

List of all softwares that can open the Markdown Documentation File
Microsoft Notepad
Microsoft WordPad
Daring Fireball Markdown
MacroMates TextMate
Apple TextEdit
Daring Fireball Markdown
GNU Emacs
Daring Fireball Markdown
File Type 2:

Machine Description File

Category: Developer Files Format: Text

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.

List of all softwares that can open the Machine Description File
Microsoft Notepad
GNU Compiler Collection (GCC)
MacroMates TextMate
GNU Compiler Collection (GCC)
GNU Emacs
File Type 3:

SEGA Mega Drive ROM

Category: Game Files Format: Binary

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.

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.

List of all softwares that can open the SEGA Mega Drive ROM
File Type 4:

MDCD Compressed Archive

Category: Compressed Files

File or group of files compressed using MDCD compression

File Type 5:

Moneydance Financial Data File

Developer by: Reilly Technologies Category: Data Files

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.

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

List of all softwares that can open the Moneydance Financial Data File
Reilly Technologies Moneydance
Reilly Technologies Moneydance
Reilly Technologies Moneydance
File Type 6:

Sharkport Saved Game File

Developer by: Sharkport Category: Game Files Format: Binary

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.

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

List of all softwares that can open the Sharkport Saved Game File
PS2 Save Builder

How to Open .MD file on different platforms

Open .MD File on Windows

  • Right-click a .MD
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .MD file and Select check box "Always use this app to open .MD files" Press "Ok"

Open .MD File on Mac

  • Right-click (or Ctrl + Left-click) the .MD file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .MD File on Linux

Right click on the .MD file, choose "Open with" and select a program from the list above

Open .MD File on iPhone

Select a file. If you don't see an application to open the .MD file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .MD File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .MD files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .MD files

  1. You need to update the application that you normally use to open .MD files. Only the latest version of the software supports the current .MD file format
  2. You need to check the .MD file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)