DIAGRAMS + DOCUMENTATION

Markdown formatter

Buy me a coffee

A local writing workbench. Polish the source, preview the page, take it anywhere.

THE WRITING ROOM / SOURCE TO PAGELOCAL BY DESIGN

Markdown source01 / WRITE

Markdown + Mermaid514 / 200,000 characters

Live preview

02 / READ

Your finished page will appear here.

Preview is not current. Wait for rendering before printing.

Make it yours. Take it with you.

One editable name. Two portable formats.

File name (editable).mdSaved as my-document.md

HTML saved as my-document.htmlPDF name suggestion: my-document.pdf

Rich-text copy uses diagram placeholders. HTML downloads and print keep the SVG diagrams.

Remember my work on this deviceOptional. Source and settings stay in this browser. Clearing removes all saved tool drafts.

Keep the source. Share the finished page.

Formatting uses Prettier with embedded code formatting off. Copy Markdown and Download Markdown preserve your current source, including Mermaid fences. Nothing is auto-formatted as you type.

Copy formatted includes basic inline styles and a plain-text alternative. Clipboard apps do not reliably preserve SVG, so Mermaid diagrams become descriptive placeholders. Use Mermaid Studio to export diagrams separately, or Download HTML for a self-contained document with SVG.

Preview supports up to 10 text-only Mermaid diagrams, each up to 50,000 characters. Any diagram that cannot render keeps its source and an explicit error. External images, media, scripts, authored styles, and loading URLs are blocked; HTTPS links remain clickable.

Print / Save PDF prints only the current preview. Choose Save as PDF in your browser's print dialog. Source, filename, and theme are not saved unless you opt in to Remember my work on this device.