What is a Markdown (.md) File?

A Markdown file (with the .md or .markdown extension) is a plain text file that uses a lightweight formatting syntax to create structured documents. Created by John Gruber in 2004, Markdown has become one of the most popular ways to format text on the web.

Why Use Markdown?

• Simplicity: Write formatted documents using simple symbols like # for headings and ** for bold
• Portability: Markdown files are plain text, so they work on any device and operating system
• Versatility: Used for README files, documentation, blogs, notes, books, and more
• Readability: Even without rendering, Markdown is easy to read in its raw form

Where is Markdown Used?

Markdown is used extensively across the software industry and beyond:

• GitHub: README files, issues, pull requests, and wikis
• Documentation: Technical docs, API references, and user guides
• Note-taking: Apps like Obsidian, Notion, and Bear use Markdown
• Blogging: Static site generators like Hugo, Jekyll, and Gatsby
• Communication: Slack, Discord, and other chat apps support Markdown

Basic Markdown Syntax

What is GitHub Flavored Markdown (GFM)?

GitHub Flavored Markdown extends standard Markdown with additional features like tables, task lists, strikethrough text, and automatic URL linking. GFM is the most widely used Markdown variant today and is the format supported by MDFileToPDF.