GitHub Flavored Markdown · Live preview · Copy HTML
Markdown
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Online Markdown Editor
Free online Markdown preview and editor. Write Markdown in the left pane and see the rendered HTML preview in real time. Supports GitHub Flavored Markdown — tables, strikethrough, task lists, fenced code blocks. Fully client-side using marked.js.
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Markdown is a lightweight markup language created by John Gruber in 2004. It uses plain-text syntax (# for headings, ** for bold, - for lists) that converts to clean HTML. It is the standard format for README files on GitHub, documentation sites (Jekyll, Hugo, Docusaurus), and note-taking apps (Notion, Obsidian).
This tool provides a live split-pane preview using the marked.js library. Type Markdown on the left and see the rendered HTML on the right in real time. Supports GitHub Flavored Markdown (GFM) including tables, strikethrough, and task lists.
Yes — click the 'Copy HTML' button to copy the raw generated HTML to your clipboard. You can then paste it into any HTML document, CMS, or email template. The HTML includes all formatting but not the Markdown source.
What is GitHub Flavored Markdown?
GitHub Flavored Markdown (GFM) is a superset of standard Markdown used by GitHub, GitLab, and many developer tools. It adds tables, task lists, strikethrough, fenced code blocks with syntax highlighting, and autolinks. Most developer documentation uses GFM.
What is the difference between Markdown and MDX?
Standard Markdown is plain text with formatting syntax that converts to HTML. MDX (Markdown + JSX) extends Markdown to allow React components inside .mdx files — used in Next.js docs, Gatsby, and component libraries. If you're writing documentation for a React project, MDX is likely what your framework expects.
Why does my Markdown render differently on different platforms?
There is no single Markdown standard — each platform uses a different "flavour". GitHub uses GFM (GitHub Flavored Markdown) which adds tables, task lists, and strikethrough. CommonMark is the most standardised spec. Reddit, Slack, Discord, and Notion all have custom variations. This tool renders standard CommonMark.
How do I add syntax highlighting to code blocks in Markdown?
Use triple backticks followed by the language name: ```javascript. Supported language identifiers include js, python, css, bash, sql, json, yaml, and dozens more. Rendering engines like Prism.js or highlight.js then apply colour syntax highlighting. GitHub, GitLab, and most Markdown renderers support this syntax.
Can I use Markdown for SEO content?
Markdown is a writing format, not an HTML delivery format — it must be converted to HTML before browsers can render it. Most CMS platforms (Ghost, WordPress with plugins, Notion, Contentful, Sanity) accept Markdown and convert it to HTML. The resulting HTML is fully SEO-friendly. Use proper heading hierarchy (one H1, then H2/H3) for best results.