.MARKDOWN File Extension

Markdown Documentation File

Developer John Gruber
3.6  |  31 Votes

What is a MARKDOWN file?

A MARKDOWN file is a text file created using one of several possible dialects of the Markdown language. It uses plain text formatting but contains inline text symbols that specify how to format the text (e.g., **bold** for bold text, or other markups for italics, indentation, headers, etc.). MARKDOWN files are designed for writing documentation in plain text that can be easily converted to HTML.

More Information

Screenshot of a .markdown file in Microsoft Notepad
MARKDOWN file open in Microsoft Notepad

In addition to HTML documentation systems, Markdown files are also useful with source code version control systems. This is because the text files can easily be reviewed in plain text against historical revisions. Projects created with GitHub, a popular online version control system, often use a file named README.markdown, which contains the readme for the source code.

A Perl program named "Markdown" is available for converting Markdown to HTML. It can be downloaded at the Daring Fireball website, which is maintained by John Gruber, the developer of Markdown.

NOTE: Markdown files may also use the .MD, .MARKDN, and .MDOWN extensions. However, the .markdown and .md extensions are the most popular.

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

Programs that open MARKDOWN files

Free Trial

Verified by FileInfo.com

The FileInfo.com team has independently researched the Markdown Documentation file format and Mac, Windows, and Linux apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

If you would like to suggest any additions or updates to this page, please let us know.