A lightweight markup language for writing formatted plain text.
Quick facts
What is Markdown
A lightweight markup language for writing formatted plain text.
GitHub Linguist classifies Markdown as a prose format, typically using extensions such as .md, .livemd, .markdown, .mdown, .mdwn, .mkd.
File extensions:
Related extensions
Related languages
Frequently asked questions
A lightweight markup language for writing formatted plain text.
Common extensions include .md, .livemd, .markdown, .mdown, .mdwn.
Sources & standards
Updated 2026-08-18
Explore this reference