📝 Markdown ↔ HTML
Convert Markdown to HTML or HTML to Markdown with live preview
✓ Free Forever · ✓ No Signup · ✓ No Upload · ✓ Works Offline
🔒 Your text never leaves your device. All processing happens locally in your browser using marked.js + Turndown.js. No upload, no server, no tracking.
Features
- Bidirectional Conversion — Convert Markdown to HTML or HTML to Markdown — switch direction with one click.
- Live Preview — See a rendered preview of your HTML output as you type or paste.
- Copy & Download — Copy the output to clipboard or download as a file.
- Sample Content — Load a sample to see how the conversion works before using your own content.
How It Works
- Choose direction — Select Markdown to HTML or HTML to Markdown conversion.
- Paste your content — Enter Markdown or HTML in the input panel.
- Copy or download — Get the converted output — copy to clipboard or download as a file.
Use Cases
- Convert README files to HTML for web publishing
- Transform Markdown blog posts to HTML
- Convert HTML snippets to Markdown for documentation
Frequently Asked Questions
Does it support GitHub-flavored Markdown?
Yes. The converter supports GFM features including tables, task lists, and fenced code blocks.
Is the HTML output clean?
Yes. The output is well-formatted, semantic HTML without unnecessary wrappers or inline styles.
Is it safe to preview a Markdown file I didn't write?
Yes. Before the preview shows anything, scripts, event handlers and javascript: links are stripped out, so a hostile .md file can't run code on this page. The HTML you copy or download is left exactly as converted — it's your document, and I don't rewrite it behind your back.
Notes from Milo 🐨
I went through this one line by line and didn't love what I found. The preview would happily run code hidden inside a Markdown file — it now cleans everything before showing it, while the HTML you download stays exactly what you wrote. HTML → Markdown was a pile of guesses that mangled images and flattened tables and nested lists; it now reads the page properly, so tables, nested lists, code blocks and images all come through. Switching direction swaps your output into the input instead of wiping it, a dropped .html file opens the right way round, and on a phone the two boxes finally stack instead of squeezing side by side.
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💬 Bug, idea, or just to say hi? Tell Milo 🐨 · hello@toolkoala.com