CleanMarkdown — Clean up messy Markdown in one click.

CleanMarkdown — Clean up messy Markdown in one click.

Pasted Markdown from a website, a chat app, or an AI chat often arrives broken: headings with no space after the #, mixed list markers, missing blank lines, and trailing spaces everywhere. CleanMarkdown fixes it instantly: it repairs heading spacing, normalizes list markers, adds blank lines around headings and lists, collapses extra blank lines, and trims trailing spaces — while leaving your code blocks exactly as they are.

It's a single HTML file. Double-click to open — no install, no account, no server. Everything runs locally in your browser; your text is never uploaded.

A live preview shows the formatted result as you go. Copy the cleaned Markdown, or download it as a .md file.

Perfect for writers, editors, students, developers, and anyone who publishes in Markdown every day.

You get: CleanMarkdown v0.1 — one HTML file, works offline.