🔄 Developer Tool

Markdown to HTML
Converter

Convert Markdown to clean HTML with live side-by-side preview. Supports GitHub Flavored Markdown — tables, code blocks, task lists & more. Copy or download instantly.

📝 Markdown Input
0 words 0 chars 0 lines 0 headings
📝
Word Counter
Count words
🗜️
CSS Minifier
Minify CSS
{ }
JSON Formatter
Format JSON

What is a Markdown to HTML Converter?

A Markdown to HTML converter transforms Markdown syntax — lightweight formatting using symbols like #, **, and - — into valid HTML markup. This tool does it live in your browser with instant side-by-side preview, so you see the rendered output as you type.

This tool supports GitHub Flavored Markdown (GFM), including tables, code fences with syntax highlighting themes, task list checkboxes, strikethrough text, and all standard Markdown formatting.

Markdown Syntax Quick Reference

MarkdownResult
# Heading 1<h1>Heading 1</h1>
**bold text**bold text
*italic text*italic text
[link](https://...)Hyperlink
```code block```Formatted code
| col | col |HTML Table

Frequently Asked Questions

Which Markdown flavor is supported?

This converter uses GitHub Flavored Markdown (GFM) via the Marked.js library — supporting tables, code fences, task lists, strikethrough, and all standard Markdown.

Can I convert a README.md to HTML?

Yes. Paste your README.md contents and get clean HTML output. Perfect for converting GitHub READMEs into documentation pages.

Is my content stored or sent anywhere?

No. All conversion happens locally in your browser using JavaScript. Your Markdown content is never uploaded, stored, or shared.

Can I download the HTML output?

Yes. Click 'Download .html' to save a complete standalone HTML file with basic styling applied. The file opens correctly in any browser.

Does it support tables and code blocks?

Yes. GitHub Flavored Markdown tables are fully supported. Code fences (triple backticks) are rendered as formatted code blocks with dark background.

What is the "Full HTML Document" option?

Enabling this wraps the converted HTML in a complete document structure with <html>, <head>, and <body> tags — ready to save and open as a standalone .html file.

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\n\n${html}\n\n`; } document.getElementById('htmlPane').textContent = output; } } function setOutputTab(tab, btn) { currentOutputTab = tab; document.querySelectorAll('.nb-tab-btn').forEach(b => b.classList.remove('active')); btn.classList.add('active'); document.getElementById('previewPane').style.display = tab === 'preview' ? 'block' : 'none'; document.getElementById('htmlPane').style.display = tab === 'html' ? 'block' : 'none'; render(); } function updateStats() { const text = document.getElementById('mdInput').value; const words = text.trim() ? text.trim().split(/\s+/).length : 0; const chars = text.length; const lines = text.split('\n').length; const headings = (text.match(/^#{1,6}\s/gm) || []).length; document.getElementById('statWords').textContent = words + ' words'; document.getElementById('statChars').textContent = chars + ' chars'; document.getElementById('statLines').textContent = lines + ' lines'; document.getElementById('statHeadings').textContent = headings + ' headings'; } function insertMd(before, after = '', placeholder = 'text') { const ta = document.getElementById('mdInput'); const start = ta.selectionStart, end = ta.selectionEnd; const sel = ta.value.substring(start, end) || placeholder; ta.value = ta.value.substring(0, start) + before + sel + after + ta.value.substring(end); ta.focus(); ta.selectionStart = start + before.length; ta.selectionEnd = start + before.length + sel.length; onInput(); } function insertTable() { const table = '\n| Column 1 | Column 2 | Column 3 |\n|----------|----------|----------|\n| Row 1 | Data | Data |\n| Row 2 | Data | Data |\n'; const ta = document.getElementById('mdInput'); const pos = ta.selectionStart; ta.value = ta.value.substring(0, pos) + table + ta.value.substring(pos); onInput(); } function loadSample() { document.getElementById('mdInput').value = SAMPLE; onInput(); render(); } function clearInput() { document.getElementById('mdInput').value = ''; document.getElementById('previewPane').innerHTML = ''; document.getElementById('htmlPane').textContent = ''; updateStats(); } function getHTMLOutput() { const md = document.getElementById('mdInput').value; if (typeof marked === 'undefined') return ''; marked.setOptions({ breaks: true, gfm: true }); const html = marked.parse(md); const addFullDoc = document.getElementById('addFullDoc').checked; if (addFullDoc) { return `\n\n\n\n\nDocument\n\n \n\n${html}\n\n`; } return html; } function copyHTML() { navigator.clipboard.writeText(getHTMLOutput()).then(() => { const btn = event.currentTarget; const orig = btn.textContent; btn.textContent = '✅ Copied!'; setTimeout(() => btn.textContent = orig, 2000); }); } function copyMd() { navigator.clipboard.writeText(document.getElementById('mdInput').value).then(() => { const btn = event.currentTarget; const orig = btn.textContent; btn.textContent = '✅ Copied!'; setTimeout(() => btn.textContent = orig, 2000); }); } function downloadHTML() { const html = getHTMLOutput(); const a = document.createElement('a'); a.href = URL.createObjectURL(new Blob([html], { type: 'text/html' })); a.download = 'converted.html'; a.click(); } // Init window.addEventListener('load', () => { loadSample(); });