Left pane: Markdown source. Right pane: HTML preview via marked, passed through DOMPurify before insertion. Copy buttons expose source, HTML, or plain text from the preview. Typing updates live; CDN scripts load marked and DOMPurify.
Syntax you can exercise
- Headings, emphasis, lists, links, fenced code, tables (GFM-style through marked).
- Preview word count reflects rendered text, not source bytes.
Safety limits
Sanitization protects the preview pane on this page. Pasting generated HTML elsewhere without review can still be unsafe if that destination does not sanitize.
Processing
Parse and preview stay in the browser. Markdown is not saved to our servers.
Markdown editor questions
What is Markdown?
Markdown is a lightweight markup syntax for writing formatted text using plain-text characters for headings, lists, links, code, emphasis, and more.
How do I write Markdown?
Type Markdown syntax into the editor, such as # for headings, **bold** for bold text, hyphens for lists, and backticks for code.
Can I draft a README here?
Yes. GitHub-style README drafts are a common use: headings, lists, code fences, and links, then copy the Markdown out.
What is Markdown used for?
Markdown is commonly used for README files, documentation, notes, blog drafts, issue comments, and developer-focused writing.
Is Markdown the same as HTML?
No. Markdown is a simpler writing syntax that can be converted into HTML for display.
Can I preview Markdown online?
Yes. This editor renders a live preview so you can review headings, lists, links, tables, and code blocks while writing.
Where is Markdown commonly used?
Markdown is common on GitHub, documentation sites, static site generators, project wikis, forums, and technical publishing workflows.
Related Developer
If you need a neighbouring step in the same workflow, these pages are the closest match: HTML/CSS/JS Minifier, Text Compare, Word & Character Counter. Browse the full Developer set or the all tools hub.