MDOWN File Extension

Markdown Format

File Type mdown
Developer John Gruber
Popularity
4.2 (37 votes)
Application Markdown
Category Text Files
Format Text

What is a MDOWN file?

Files with the MDOWN extension are specifically tied to Markdown Format, a Text Files type, and there are 315 files in this category.

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

MDOWN files are compatible with various operating systems, including Windows, Mac OS and Linux. When working with MDOWN files, you can rely on 5 programs, including Markdown, TextEdit and Sublime Text.

Windows

Mac OS

Linux

How to open a MDOWN file?

If you can’t open a MDOWN 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.

Markdown, TextEdit and Sublime Text are among the most widely used programs for handling MDOWN files. To install the most up-to-date edition of Markdown, visit the official John Gruber website. You can download the build that works across all operating systems.

After installing, your OS should instantly open MDOWN files with Markdown.

Setting Markdown as default MDOWN viewer

Change the default app for a file type in Mac

Initiate a right click or use Control + left click on the desired MDOWN file to open a menu where you can select various actions;
Choose "Open in Application" and click "Other";
Look towards the bottom of the window, where you will find the "Enable" menu. "Recommended programs" will be the default selection;
Choose "All Programs" in this menu and search for Markdown. Check the box next to "Always open in app" to set it as the default option.

Change default programs in Windows

Take the first step by right-clicking on your MDOWN file. Next, select "Open With" and then choose "Choose another app" from the available options;
Choose Markdown from the available applications listed in the pop-up window to set it as the default application to open your MDOWN file;
Be sure to check the "Always use this app" checkbox, and then click "OK" to confirm your selection.

Tips and tricks to solve problems with MDOWN files

Problematic MDOWN files can usually be resolved by making small changes in your software. See the tips below to help fix common issues.

Are there any techniques or tools available to repair a damaged MDOWN file?

In a data recovery program, open the damaged MDOWN file and select the "Repair" menu option. Wait for the recovery process to finish as it will automatically restore the damaged text files.

How do I know if my MDOWN file has been damaged?

The signs of corrupted MDOWN text files can manifest as:

Error alerts occur when actions are performed on the file;
The file shows slow performance when edited in Markdown;
The file encounters problems during the opening process or shows error indications;
An unexplained increase in the size of the MDOWN file;
The file causes Markdown or other software to hang or crash during various operations;

What factors contribute to Markdown crash?

Lack of software updates is a possible reason behind Markdown crash. Keep your John Gruber products up to date by installing the latest updates.

Restarting your computer is an essential troubleshooting step that can resolve many common problems. It is recommended to restart your computer before making any changes to the software settings.

How to edit a MDOWN file?

To modify MDOWN files, it is necessary to install dedicated software that lets you open and edit text files. Online MDOWN editors generally offer fewer tools compared to programs designed for Markdown Format.

Best MDOWN editors 2026

Based on the specified criteria, here is a list of MDOWN editors that may fit your requirements.

MDOWN Editor Software	Developer	Platforms	Overall Rating
TextEdit	Apple	Mac OS	4.8 out of 5 (40 reviews)
Gedit	GNOME	Linux	4.6 out of 5 (38 reviews)
Markdown	John Gruber	Windows	4.6 out of 5 (36 reviews)
Notepad++	Notepad++ Team	Windows	4.6 out of 5 (37 reviews)
Sublime Text	Sublime HQ Pty	Windows, Mac OS, Linux	4.6 out of 5 (39 reviews)

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