MD File Extension

Markdown Documentation Format

File Type md
Developer John Gruber
Popularity
4.1 (36 votes)
Application Markdown
Category Text Files
Format Text

What is a MD file?

Markdown Documentation Format, identified by the MD extension, is a Text Files type and includes 315 files.

The Markdown Documentation Format (MD), created by John Gruber, is one of file format they developed, and they also built programs to support them.

MD file support extends to various operating systems, including Windows, Mac OS and Linux. When working with MD files, you can rely on 5 programs, including Markdown, Visual Studio Code and Atom.

Windows

Mac OS

Linux

How to open a MD file?

If you can’t open a MD file, it is usually because the necessary software is missing. To resolve the issue, select the right program from the list for your operating system. Then go to the official website of the developer, download the software, and install it.

When it comes to opening and working with MD files, Markdown, Visual Studio Code and Atom are the top choices for users. To install the updated version of Markdown, simply go to the John Gruber site and download the installer compatible with all major platforms.

Once the process is complete, Markdown should take over as the default application for MD files.

Set Markdown as the default MD program

Changing Default Programs in Windows

Right-click on your MD file, then choose the "Open with" option and select "Choose another application" from the available options;
In the pop-up window, select the Markdown application;
Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening MD files.

Change Default Program on Mac

Right click or Control + left click on the desired MD file;
Select "Open in application" and click "Other";
At the bottom of the window, you will find the "Enable" menu. Default, will be set to "Recommended Programs";
Choose "All Programs" in this menu and search for Markdown. Check the box next to "Always open in app" to make it the default program.

Solve problems with MD files

Rest assured, any issues with MD files can typically be addressed with simple software adjustments. See the tips below for help.

Why does Markdown stop responding or crash intermittently?

Markdown crashes can be caused by outdated software. Keep your John Gruber products up to date by installing the latest updates.

Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.

What are the best practices for repairing a MD file that has gone bad?

Use a data recovery program to open the damaged MD file and from the menu choose "Repair" function to start the repair process. Allow the recovery process to complete, which will automatically repair the damaged text files.

What are the warning signs that my MD file may be corrupted?

Common indications of damaged MD text files are:

Error messages appear during the course of working with the file;
Editing the archive in Markdown results in slow or unresponsive behavior;
Opening the file results in an error or a failed attempt;
Unexpected expansion of the total size of the MD file;
Opening the file in Markdown or other programs causes them to hang or crash;

How to edit a MD file?

To edit MD files, it is essential to install software that supports not only viewing but also editing the text files. Online MD editors provide limited functionality compared to full-featured software for Markdown Documentation Format.

List of Top MD editors 2026

Based on the criteria above, here is a selection of MD editors you can use.

MD Editor Software	Developer	Platforms	Overall Rating
Visual Studio Code	Microsoft	Windows, Mac OS, Linux	4.7 out of 5 (38 reviews)
Markdown	John Gruber	Windows	4.6 out of 5 (36 reviews)
Sublime Text	Sublime HQ Pty	Windows, Mac OS, Linux	4.6 out of 5 (39 reviews)
Atom	-	Windows, Mac OS, Linux	4.1 out of 5 (36 reviews)

Convert to and from MD

If obstacles arise while working with a MD file, you may convert it to formats like PDF or other similar types for smoother handling.

Keep in mind that converting a MD file may introduce some limitations, but the original format can often be restored.