Free · Open source · Client-side

Markdown to HTML

Convert Markdown to clean HTML

New to MDX? Read MDX vs Markdown or browse the MDX cheatsheet.

How to Convert Markdown to HTML

Paste Markdown into the editor and the HTML appears beside it as you type. Headings become <h1> through <h6>, lists become <ul>, <ol>, and <li>, fenced code becomes <pre><code>, and emphasis maps to <strong> and <em>. No wrapper divs, no classes, no inline styles. Copy the result out, or download it as an .html file.

What gets converted

Core Markdown, as CommonMark defines it: headings, paragraphs, bold and italic, inline code, fenced code blocks with the language recorded as class="language-js" or similar, links, images, blockquotes, horizontal rules, and both kinds of list. YAML frontmatter is rendered as a pre block, or dropped entirely when you toggle it off. GitHub extensions aren't enabled, so pipe tables, task lists, and strikethrough come through as literal text.

HTML output quality

The output is semantic HTML5 with nothing bolted on. No inline styles, no framework classes, no wrapper elements to strip out later. remark-rehype does the conversion, which is the same pipeline running behind most static site generators, so the result is safe to drop into a CMS field, an email template, or a page you're assembling by hand.

Common use cases

Migrating Markdown into a CMS that only stores HTML is the usual reason people land here. It also works for prepping a post for email, or for pulling out a snippet to embed somewhere that won't run a Markdown renderer. If you're building a Markdown pipeline of your own, it's a quick way to see what remark-rehype produces before you wire it into anything.

Frequently Asked Questions

Is the Markdown to HTML converter free and open source?

Yes. The Markdown to HTML converter is free and open source under the Apache 2.0 license. The full source code is on GitHub at github.com/jamdesk/utilities, and there are no ads, accounts, or usage limits.

Does it support GitHub Flavored Markdown?

No. The converter handles CommonMark: headings, lists, code blocks, links, images, emphasis, and blockquotes. GFM extensions aren't enabled, so pipe tables, task lists, strikethrough, and bare-URL autolinks pass through as plain text rather than being converted.

Can I use the HTML output in an email?

Yes, with one caveat. The HTML is clean and has no CSS or JavaScript dependencies, which email clients handle well, but it carries no styling at all. Most clients need inline styles to render consistently, so run the output through an inliner before sending.

Does it handle code syntax highlighting?

It records the language rather than applying the highlighting. A fenced block tagged js comes out as <code class="language-js">, which is exactly what Prism.js and highlight.js look for, so the colors come from whichever library you load on the page.

About this tool

The Markdown to HTML converter is free and open source. It runs entirely in your browser. Your input is never uploaded, stored, or logged. Open the network tab in your developer tools while the tool runs and you can confirm that for yourself. The full source code is on GitHub under the Apache 2.0 license, so you can read the code, file issues, or fork the project. There are no ads, no accounts, and no usage limits. Built and maintained by Jamdesk.

Maintained by Jamdesk · Last reviewed 2026-08-21

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