About Markdown Formatter – Prettify & Format .md Online
Markdown is forgiving by design — `*`, `+`, and `-` all make a bullet, headings render whether or not there's a space after the `#`, and tables work even when the pipes don't line up. That flexibility is great for writing and terrible for diffs: every contributor's editor reformats things differently and pull requests fill with noise.
This free Markdown formatter prettifies the `.md` source itself to a consistent house style. It normalizes heading spacing, settles on one list marker, fixes indentation, and aligns GFM tables — while leaving the contents of code fences byte-for-byte untouched. Optional prose wrapping reflows paragraphs to a fixed width or joins them onto single lines. Everything runs in your browser, so your docs never leave your device.
Note: this tool formats Markdown text. If you want to turn Markdown into rendered HTML, use the Markdown to HTML tool instead.
Features
- Normalize heading spacing and list markers to one consistent style
- Align GFM tables and tidy nested-list indentation
- Prose wrap: preserve, always (reflow to width), or never (join lines)
- Code fences are left untouched — content stays byte-identical
- Idempotent output: formatting twice equals formatting once, for clean diffs
How to use
- Paste your Markdown into the input pane.
- Pick a Prose wrap mode (preserve keeps your line breaks; never joins them).
- Click Format to normalize headings, lists, and tables.
- Copy the tidied Markdown from the output pane.
Frequently asked questions
How is this different from a Markdown to HTML converter?
This tool formats the Markdown source text — the .md file itself — so it stays valid Markdown, just tidier. A Markdown to HTML tool renders Markdown into HTML markup. Use this one to clean up READMEs and docs; use Markdown to HTML when you need rendered output.
Will it change the text inside my code blocks?
No. Content inside fenced and indented code blocks is preserved exactly, including unusual spacing and indentation. Only the surrounding Markdown structure is normalized.
What does "prose wrap" do?
"Preserve" keeps your line breaks as written. "Always" reflows paragraphs to a fixed print width. "Never" joins each paragraph onto a single line — handy when your platform wraps text for you.
Is my content uploaded anywhere?
No. Formatting runs entirely in your browser using Prettier compiled to run locally. Nothing you paste leaves your device.
Related tools
Everything runs locally in your browser — your input is never uploaded.