HTML Minifier

How to Use HTML Minifier

1. Paste or type your HTMLinto the input editor on the left. You can also click “Load Example” to see how it works with a full HTML5 page.
2. Configure minification options using the toggle switches. Enable or disable whitespace collapsing, comment removal, optional tag removal, and inline tag whitespace collapsing independently.
3. Click “Minify” to process your HTML. The tool also auto-processes your input automatically as you type (with a 500ms debounce).
4. Review the output in the right-hand editor. The minified HTML is read-only and syntax-highlighted for easy inspection.
5. Check the stats— the tool shows original size, minified size, percentage saved, and the compression ratio so you can see exactly how much you saved.
6. Copy or downloadthe minified output using the buttons below the output editor. The downloaded file will be saved as “minified.html”.

Features

• Four configurable minification options— toggle whitespace collapsing, comment removal, optional tag removal, and inline tag whitespace collapsing independently.
• Preserves <pre>, <textarea>, <script>, and <style> — whitespace inside these elements is semantically significant and is never touched during minification.
• Preserves conditional comments— IE conditional comments like <!--[if IE]>are kept intact for legacy browser support.
• Void element self-closing— automatically self-closes all HTML5 void elements (img, br, hr, input, meta, link, area, base, col, embed, source, track, wbr).
• Optional tag removal— strips optional closing tags per the HTML5 spec (</li>,</p>,</tr>,</td>, etc.).
• Inline tag whitespace collapsing— removes unnecessary spaces between inline elements like span, a, strong, em, code, and more.
• Size statistics— see original size, minified size, bytes saved, percentage saved, and compression ratio at a glance.
• 100% client-side (privacy-first)— all processing happens in your browser. Your HTML never touches a server.
• Copy and download— one-click copy to clipboard or download as a .html file.
• Dark mode support— fully supports both light and dark themes.

HTML Minification Best Practices

• Minify in production, not in development. Keep your source HTML readable during development with proper indentation and comments. Only minify during your build step or before deploying to production.
• Combine with Gzip or Brotli. Minification and compression are complementary, not alternatives. Minify first, then enable server-side compression for the smallest possible transfer size. Most web servers and CDNs support Gzip or Brotli out of the box.
• Don’t minify manually. Use build tools like html-minifier-terser (for Webpack/Vite), HTMLMinifier (standalone), or this tool for quick one-off minification. Manual minification is error-prone and hard to maintain.
• Test after minification.Always verify that your page renders correctly after minification. While the tool preserves <pre>, <textarea>, <script>, and <style> content, edge cases can occur with unusual HTML structures.
• Be cautious with inline tag whitespace.Whitespace between inline elements can be visually significant in some layouts (e.g., navigation menus with space-separated links). If you notice layout issues, try disabling the “collapse inline tag whitespace” option.
• Keep source maps for debugging. If you minify HTML with embedded JavaScript or CSS, consider keeping source maps so you can debug production issues more easily.
• Use a CDN for caching. Minified HTML combined with proper cache headers and a CDN gives you the fastest possible page load times for repeat visitors.