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Text & Writing
Markdown Editor
Live split-pane Markdown preview with HTML export.
What it does. A Markdown editor renders formatting syntax as you type. This one gives you a split pane with live preview, supports GitHub-flavored Markdown including tables and task lists, and exports clean HTML. Everything renders locally, so drafts and internal documentation stay on your device.
Runs in your browserNothing uploadsNo signupWorks offline
How to use Markdown Editor
- Type or paste Markdown in the left pane.
- The right pane renders it live, including tables, code blocks and task lists.
- Export as HTML, or copy the rendered output for pasting into a CMS.
Markdown syntax reference
| You write | You get |
|---|---|
# Heading | A level-1 heading |
**bold** | bold |
*italic* | italic |
[text](url) | A link |
 | An image |
`code` | inline code |
```lang | A fenced code block |
> quote | A block quote |
- item | A bullet list |
1. item | A numbered list |
- [ ] task | An unchecked task box |
| a | b | | A table row |
--- | A horizontal rule |
Which Markdown flavor is this?
GitHub-flavored Markdown, which is the de facto standard. It extends the original 2004 specification with tables, fenced code blocks, task lists, strikethrough and automatic URL linking.
That matters because Markdown is not one language. CommonMark is the strict specification; GFM is CommonMark plus the extensions above; and individual tools add their own. A table renders on GitHub, in Obsidian and in most static site generators, and does nothing at all in a strict CommonMark renderer.
If your target is a specific platform, check its documentation for footnotes, math and mermaid diagrams in particular — those are the extensions with the least consistent support.
Is the HTML output safe to publish?
Yes. The rendered output is sanitized before it is displayed or exported, which removes script tags, event handler attributes and javascript: URLs.
This matters more than it sounds. Markdown permits raw HTML by design, so a document from an untrusted source can carry an XSS payload straight through a naive renderer into your page. Any system that renders user-submitted Markdown — a comment box, a wiki, a support ticket — must sanitize after rendering, not before.
The exported HTML is plain semantic markup with no inline styles, so it drops cleanly into a CMS or a templating system.
What is Markdown good for?
Anything that needs structure but not layout. It is plain text, so it diffs cleanly in version control, survives being emailed, and will still open in fifty years.
READMEs, technical documentation, changelogs, notes, blog drafts and issue descriptions are all better in Markdown than in a word processor, because the formatting is visible in the source and the file has no proprietary container around it.
Where it stops being the right tool is anything needing precise layout — a report with figures positioned relative to text, a document with headers and footers, or anything going to print. Markdown deliberately has no concept of a page.
Frequently asked questions
Does it support tables?
Yes, GitHub-flavored table syntax with alignment markers. Tables are one of the extensions missing from strict CommonMark, so check your target platform if you are publishing elsewhere.
Can I export to PDF?
Export to HTML and print to PDF from your browser, which gives you control over margins and page size. A direct PDF export would have to guess at those.
Is my document saved?
It stays in the editor while the page is open and is not transmitted anywhere. Export or copy before closing the tab.
Does it render images?
Yes, for images at a public URL. Local file paths cannot be resolved by a browser for security reasons.
What about code syntax highlighting?
Fenced code blocks render in a monospace block with the language label preserved. Full tokenized highlighting would require loading a highlighting library, which is not worth the bytes for a preview.
Is the HTML sanitized?
Yes. Script tags, event handlers and javascript: URLs are stripped from the rendered output and the export.
Does it work offline?
Yes, after your first visit — the renderer is part of the cached page.
Guides for Markdown Editor
- Text Tools That Save Real Time7 min read
- How to Write a Two Weeks Notice6 min read