HTML Formatter & Validator

Developer Tool Featured

Format, validate, minify, and beautify HTML code instantly. Perfect for web developers, designers, and content creators.

Formatting Options

HTML Input

0 characters

Formatted Output

Enter HTML and click "Format HTML" to see results

HTML Preview

Preview will appear here

HTML Best Practices

  • Use semantic HTML5 tags
  • Always close tags properly
  • Use lowercase for tags and attributes
  • Quote all attribute values

Common Uses

  • Cleaning up messy HTML code
  • Preparing HTML for minification
  • Debugging HTML structure
  • Learning HTML formatting

Features

  • Real-time HTML validation
  • Syntax error highlighting
  • Live HTML preview
  • Multiple formatting options
`; break; } document.getElementById('htmlInput').value = sampleHTML; document.getElementById('htmlInput').dispatchEvent(new Event('input')); } function copyOutput() { const output = document.getElementById('htmlOutput').textContent; navigator.clipboard.writeText(output).then(() => { const btn = document.getElementById('copyBtn'); const originalHTML = btn.innerHTML; btn.innerHTML = ' Copied!'; btn.classList.add('bg-green-500'); setTimeout(() => { btn.innerHTML = originalHTML; btn.classList.remove('bg-green-500'); }, 2000); }); } function downloadOutput() { const output = document.getElementById('htmlOutput').textContent; const blob = new Blob([output], { type: 'text/html' }); const url = URL.createObjectURL(blob); const a = document.createElement('a'); a.href = url; a.download = `formatted-html-${Date.now()}.html`; document.body.appendChild(a); a.click(); document.body.removeChild(a); URL.revokeObjectURL(url); }