Markdown to HTML
Convert Markdown to HTML in your browser. Powered by marked with GitHub-flavored extensions (tables, task lists, autolinks). Runs entirely locally.
Markdown in, HTML out
Markdown's compact authoring syntax expands into structured HTML elements. Headings, emphasis, lists and tables all round-trip cleanly.
# Hello A **bold** word.
<h1>Hello</h1> <p>A <strong>bold</strong> word.</p>
What you'll use this for
Markdown is the writing format of the modern web. Preview, paste, and ship HTML from any Markdown source — without spinning up a build tool.
Static-site previews
Sanity-check post output before pushing to your generator (Hugo, Eleventy, Astro, Jekyll).
README rendering
Preview a README.md exactly the way GitHub will render it, with GFM tables and task lists.
Email templates
Write in Markdown, paste the HTML into a transactional email template or newsletter.
Docs pipelines
Quickly debug a Markdown file before it enters your docs build, without local tooling.
How to convert Markdown to HTML
Paste your Markdown
Drop your .md contents into the left editor. Standard CommonMark with GFM extensions is supported.
Pick options
Toggle GitHub-flavored extensions for tables and task lists. Enable line-break conversion if you author in soft-wrap.
Click Render
Or leave auto-render on for live updates. Runs locally — no upload.
Copy or download
Copy the HTML to your clipboard, save as output.html, or jump to the reverse tool for round-trip checks.
Frequently asked questions
GitHub-flavored Markdown (GFM) via the marked engine — tables, task lists, autolinks, strikethrough, fenced code blocks. You can disable the GFM extensions to fall back to plain CommonMark.
No. Raw HTML embedded in Markdown passes through untouched. If you plan to publish the output on a server that serves it to other users, sanitize it on the server with DOMPurify or an equivalent before rendering.
Yes. No signup, no limits, no ads. Everything runs in your browser.
Yes — as long as the GitHub-flavored toggle is on. Standard pipe tables, task list checkboxes, autolinks and tilde-strikethrough all render correctly.
Yes — use HTML to Markdown to convert raw HTML back into Markdown using turndown.
About Markdown to HTML conversion
Markdown is a lightweight plain-text formatting syntax that compiles down into HTML. This tool uses marked, one of the fastest and most battle-tested Markdown parsers — the same engine used by countless static-site generators and editor previews.
The marked engine
- CommonMark compliant out of the box.
- Streaming compilation — fast even for long documents.
- Pluggable: GFM extensions enabled by default in this tool.
GFM extensions
- Tables — pipe-delimited tables with header rows and optional column alignment.
- Task lists —
- [ ]and- [x]checkbox items. - Autolinks — bare URLs become clickable links.
- Strikethrough —
~~text~~produces<del>.
Security note
marked does not sanitize HTML by default. If you intend to render the output as live HTML for other users, pipe the result through DOMPurify first. Local previews and trusted authors are fine as-is.