Markdown formatter

Tidy Markdown and compare the result before copying it.

Privacy: runs in your browser

This tool processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Favorites store only tool names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. When a button sends your result to another tool, it waits in this tab until that tool opens it, for up to a minute, and is then deleted.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

English

Your text

Indentation

Your result

Compare changed lines

Save a draft on this device

Save edits to this draft

Draft saving is off. Nothing is uploaded.

Keep the text, tidy the layout

Formatting uses Prettier with Markdown parsing. The side-by-side source and result let you inspect list markers, wrapping and fences before copying. Prose wrapping is preserved by default.

Worked example

A heading, a list and a fenced JSON block stay separate blocks. The code inside the fence may be formatted according to its named language.

Next: JSON formatter

Before you rely on the result

Formatting cannot tell whether your renderer supports a particular extension. HTML inside Markdown is treated as markup text here and is never executed. Review the visible line comparison for changes.

Cite this page

Citation style

ToolOctopus. “Markdown formatter.” Updated 2026-10-11. https://tooloctopus.com/markdown-formatter.

Add an access date if your instructions require one.

Citation formatting uses citeproc-js by Frank Bennett and Citation Style Language styles. License and source code.