Free Markdown Editor
Markdown Editor shows a live preview of GitHub-style Markdown as you type, including tables, task lists, KaTeX math and Mermaid diagrams. Export the document as .md, standalone HTML, Word (.docx) or PDF, or convert Word, HTML and PDF files into Markdown. Remote images are not loaded unless you turn them on.
- Exports:
- .md, HTML, Word (.docx), PDF
- Imports:
- .md, .docx, .html, .pdf (text only)
- Extras:
- KaTeX math, Mermaid diagrams
- Price:
- Free
- Runs:
- Locally, in your browser
- Uploads:
- None: files never leave your device
- Account:
- Not needed
Quick answers
Is my document uploaded anywhere?
No. Editing, preview, imports and exports all run in your browser. The document is saved only in this browser's local storage so it survives a reload.
How do I save as PDF?
Press PDF / Print and pick “Save as PDF” (or “Microsoft Print to PDF”) as the printer. The page is laid out with print-friendly styles, math and diagrams included.
Processed on your device: your files are never uploaded. How it works
Network activity in this tab
What this page has requested since you opened the site in this tab. An upload is any request that sends data: POST, PUT, PATCH or a request with a body.
No uploads: nothing has been sent from this page.
No network requests yet.
To see every request, open your browser's developer tools (Network tab).
How to use the Markdown Editor
- Type Markdown on the left (or open a .md, Word, HTML or PDF file) and watch the preview on the right.
- Use the toolbar or shortcuts for bold, headings, links, lists, tables, math ($…$, $$…$$) and Mermaid diagrams.
- Switch between Editor, Split and Preview views; editor and preview scroll together.
- Export as .md, standalone HTML, Word (.docx) or PDF (choose “Save as PDF” in the print dialog).
Credits & open source
Our own code plus open-source libraries. Thank you to the people who make these projects.
- CodeMirror 6Code editor with syntax highlighting. © Marijn Haverbeke and others · MIT
- @uiw/react-codemirrorReact wrapper for CodeMirror 6. © Kenny Wong (uiwjs) · MIT
- markdown-itFast CommonMark-compliant Markdown parser. © Vitaly Puzrin, Alex Kocharin · MIT
- @vscode/markdown-it-katexMath ($…$) support for markdown-it using KaTeX. © Microsoft Corporation · MIT
- KaTeXFast math typesetting. © Khan Academy and other contributors · MIT
- MermaidDiagrams and charts from text. © Knut Sveidqvist and contributors · MIT
- DOMPurifySanitizes HTML to prevent script injection. © Mario Heiderich, Cure53 and contributors · MPL-2.0 OR Apache-2.0
- TurndownConverts HTML into Markdown. © Dom Christie · MIT
- MammothConverts Word .docx documents to clean HTML. © Michael Williamson · BSD-2-Clause
- docxCreates Word .docx files. © Dolan Miu · MIT
- PDF.jsRenders PDF pages to images and thumbnails. © Mozilla Foundation and contributors · Apache-2.0
Web platform APIs used: File API, localStorage, Clipboard API, Canvas 2D, Intl.Segmenter, URL API.
- KaTeX fonts by Khan Academy and other contributors (KaTeX; based on Computer Modern) (MIT) — Math fonts loaded by the KaTeX stylesheet in the preview, shipped in the katex package and self-hosted.
Full license texts: third-party notices · all credits
Frequently asked questions
Can I convert Word to Markdown?
Yes. Open a .docx file: headings, bold and italic text, lists, links, tables and pictures are converted to Markdown. Complex layouts such as text boxes or columns are simplified.
Which Markdown features are supported?
GitHub-style Markdown: tables with alignment, task lists, strikethrough, fenced code, automatic links, plus math with KaTeX ($…$ and $$…$$) and Mermaid diagrams in ```mermaid blocks.
Why does an image show a placeholder?
Images hosted on other websites are not loaded by default, for privacy. Turn on “Load remote images”, or insert pictures from your device: they are embedded in the document.
What happens to math and diagrams in Word?
Diagrams become pictures. Formulas are kept as LaTeX text, because Word's equation format is different; the HTML and PDF exports show them fully typeset.