What is a .md file? (And what to do with one)

You downloaded README.md, or an AI assistant handed you notes.md — here's what that file is, why tech people love the format, and how to turn it into a Word or PDF document anyone can read.

A .md file is Markdown: plain text that describes its own formatting

.md stands for Markdown, a plain-text format where simple characters carry formatting meaning. A line starting with # is a title; wrapping a word in **two asterisks** makes it bold; pipes arranged in rows describe a table. Because the file is ordinary text, it survives version control, diff tools, email and decades of software change — which is why it's the native format of GitHub READMEs, technical documentation, AI chatbots and note apps like Obsidian.

# Meeting notes

- [x] agenda sent
- [ ] minutes posted

See **the full report** for details.

Rendered, that becomes a formatted title, a checkbox list and a bold phrase — but the file itself never stops being text you can open anywhere.

What opens a .md file

ToolWhat you see
Notepad / TextEdit / any text editorThe raw text, markers and all — fine for editing, ugly for reading
VS Code, Obsidian, TyporaRaw text plus a rendered preview pane
Browser preview (DocsFast editor)Formatted view, live as you type — nothing installed
A converter → WordA real .docx with Heading styles and editable tables

Microsoft Word itself has no Markdown import: opening the file directly treats it as unknown text. Convert first, then open in Word.

Turning a .md file into a document

  1. Preview it — open it in the online editor to confirm the content reads correctly formatted.
  2. Convert it — Markdown → Word for an editable .docx, → PDF for a print-ready file, or → HTML for a styled web page. The conversion runs in your browser; upload nothing.
  3. Check the report — the fidelity report lists which elements (tables, code, footnotes, math) converted natively and which were approximated, before you download.

Common files you'll meet

Related

Frequently asked questions

How do I open a .md file?

Any text editor opens it — Notepad, TextEdit, VS Code — because a .md file is plain text. To see it formatted rather than as raw syntax, use a Markdown preview tool like the DocsFast editor, which renders the formatting live in your browser.

Can I convert a .md file to Word?

Yes. A converter parses the Markdown structure and produces a real .docx — headings as Word Heading styles, tables as editable tables. The DocsFast Markdown to Word tool does this in your browser without uploading the file.

Is a .md file safer than a .docx?

Meaningfully safer to receive. A .md file is plain text: it cannot carry macros, embedded scripts or exploit payloads the way binary document formats can. If someone sends you a README.md, opening it in a text editor poses no document-exploit risk.

Why did an AI chatbot give me a .md file?

AI assistants write Markdown because it is plain text that still describes structure. A file named notes.md or CLAUDE.md from an AI session contains that Markdown; convert it to Word, PDF or HTML to share it with people who expect a formatted document.