I built a free Markdown to HTML Converter that runs entirely in your browser

What I built

I added a Markdown to HTML Converter to devnestio — a growing collection of free, single-file developer tools.

👉 https://markdown-to-html-dev.pages.dev

Write Markdown on the left, see a live HTML preview on the right. Switch to the HTML tab to inspect syntax-highlighted output, then copy or download it.

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Features

• Live preview as you type — no button to click
• HTML output view with syntax highlighting
• Supports headings (H1–H6), bold, italic, bold+italic
• Inline code and fenced code blocks (with language class)
• Unordered and ordered lists
• Blockquotes
• Tables with <thead> / <tbody>
• Horizontal rules
• Links, auto-links, images
• Strikethrough ~~text~~
• Copy HTML to clipboard
• Download as .html file with full page wrapper
• Word count, line count, HTML character count stats

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Why I built it

I often need to convert README snippets or documentation drafts to HTML to paste into a CMS or email template. Most online converters either send your content to a server, require sign-up, or have intrusive ads. This one is a single HTML file — zero dependencies, zero server round-trips.

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Tech

• Pure Vanilla JS — no frameworks, no npm, no build step
• Single .html file, deployable anywhere
• Hosted on Cloudflare Pages (free tier)
• 102 Node.js assert tests covering all parsing logic

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Try it

👉 Markdown to HTML Converter

All tools: https://devnestio.pages.dev