Headings # through ###### ; bold, italic, strike Inline `code` and fenced ```lang blocks Bullet / numbered / nested lists Links [text](url) and images ![alt](url) Blockquotes, pipe tables with alignment, horizontal rules

This is a fast in-browser parser, not a spec suite. CommonMark and GFM have edge cases (nested emphasis, link reference definitions, autolink expansion) that diverge between implementations. For strict conformance, use marked , markdown-it , or remark in a build step. HTML embedded inside Markdown mostly passes through as-is, but some implementations sanitise it. Don't rely on this for security; treat untrusted markdown as untrusted HTML. Tables vs alignment. Pipe tables need a separator row ( |---| ) and use :---: / :--- / ---: for centre/left/right alignment. Forgetting the separator is the most common reason a "table" renders as one paragraph. Smart punctuation. Some renderers convert -- to en-dashes and straight quotes to curly. This tool doesn't — pass through a typography pass if you need that. Round-tripping isn't lossless. Markdown → HTML → Markdown will normalise heading style, list spacing, and link form. The semantics survive; the exact bytes don't.

Markdown vers HTML

Convertissez Markdown en HTML propre avec aperçu en direct. Titres, listes, code, tableaux, images et liens.

Markdown

Preview

HTML output

Saisissez une entrée ci-dessus pour voir le résultat.

What is this for?

Markdown is the most-written authoring format on the planet — README files, blog posts, GitHub issues, chat messages, doc sites. HTML is what browsers render. This tool converts Markdown into clean HTML with a live preview so you can see what the rendered output will look like before pasting it into a CMS, generating a static page, or shipping it as part of an email template.

Supported syntax

Headings # through ######; bold, italic, strike
Inline `code` and fenced ```lang blocks
Bullet / numbered / nested lists
Links [text](url) and images ![alt](url)
Blockquotes, pipe tables with alignment, horizontal rules

Common gotchas

This is a fast in-browser parser, not a spec suite. CommonMark and GFM have edge cases (nested emphasis, link reference definitions, autolink expansion) that diverge between implementations. For strict conformance, use marked, markdown-it, or remark in a build step.
HTML embedded inside Markdown mostly passes through as-is, but some implementations sanitise it. Don't rely on this for security; treat untrusted markdown as untrusted HTML.
Tables vs alignment. Pipe tables need a separator row (|---|) and use :---: / :--- / ---: for centre/left/right alignment. Forgetting the separator is the most common reason a "table" renders as one paragraph.
Smart punctuation. Some renderers convert -- to en-dashes and straight quotes to curly. This tool doesn't — pass through a typography pass if you need that.
Round-tripping isn't lossless. Markdown → HTML → Markdown will normalise heading style, list spacing, and link form. The semantics survive; the exact bytes don't.