Developer Tools
Markdown to HTML Converter
Paste markdown and instantly get clean HTML, plus a live preview of how it renders. Supports headings, lists, code blocks, and GitHub-flavored tables — all in your browser, nothing uploaded.
HTML output
What makes this tool different
GitHub-flavored markdown
Tables, strikethrough, and fenced code blocks with language classes render correctly, matching what GitHub and most static site generators expect.
Live preview
Toggle the preview to see your markdown rendered as HTML in real time — perfect for checking tables and code blocks before copying.
Clean semantic output
Headings use h1-h6, lists use ul/ol, and code blocks use pre/code — ready to drop straight into any HTML page.
100% client-side
Conversion runs locally with a dependency-free parser. No uploads, no signup — verify it in your Network tab.
About this tool
Markdown to HTML Converter: everything you need to know
Markdown is the default writing format for READMEs, docs, forums, and static sites — but when you need raw HTML, converting by hand is tedious. OpenToolLab's markdown to HTML converter turns your markdown into clean, semantic HTML in one click.
The converter handles headings, bold and italic, links, images, ordered and unordered lists, blockquotes, horizontal rules, and fenced code blocks. With GitHub-flavored markdown enabled, pipe tables and strikethrough also render correctly.
The built-in live preview shows exactly how your markdown renders as HTML in real time, so you can check tables, code blocks, and nesting before copying the output. The generated HTML uses semantic tags ready to drop into any page.
Everything runs locally with a dependency-free parser — no uploads, no signup, and no risk of your content sitting on a server. Open the Network tab and you'll see zero requests.
Whether you're preparing a blog post, converting a README, or building an email, this markdown to HTML converter does the job privately and instantly — and pairs well with OpenToolLab's HTML to JSX converter for React work.
FAQ
Markdown to HTML Converter — frequently asked questions
How do I convert markdown to HTML online?
Paste your markdown into the input box and click Convert to HTML. The tool outputs clean semantic HTML for headings, lists, code blocks, and links, and you can enable live preview to see how it renders.
Is the markdown to HTML converter free?
Yes, completely free with no signup and no limits. The converter runs entirely in your browser, so there are no servers or subscriptions involved.
Does it support tables and code blocks?
Yes. With GitHub-flavored markdown enabled (default), pipe tables render as HTML tables and fenced code blocks render as pre/code with a language class for syntax highlighting.
How do I convert markdown to HTML in JavaScript?
In JavaScript you'd normally use a library like marked or markdown-it. If you'd rather not add a dependency or build a project, this online converter does the same thing instantly with a live preview.
Can I convert markdown to HTML in Python?
In Python the markdown library does this: markdown.markdown(text). For a one-off conversion without installing anything, this browser-based tool is the quickest option.
Does it support GitHub-flavored markdown (GFM)?
Yes. The GFM toggle (on by default) enables tables and strikethrough, the two features that differ from classic markdown. Fenced code blocks with language tags are always supported.
Is the conversion private?
Yes. Everything runs locally in your browser — no data is uploaded, stored, or tracked. Open your Network tab while converting and you'll see zero requests leave your device.
Can I copy the HTML output?
Yes. Use the Copy button, or the one-click copy icon on the output box, to copy the full HTML for pasting into your site or email.
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