Free Online HTML Minifier

1. Paste your HTML into the input box.
2. Read the minified markup in the output box.
3. Compare the original and minified byte counts shown above it.
4. Copy the smaller markup for production; pre and textarea stay untouched.

Browsers ignore most insignificant whitespace between block-level tags, and they never display HTML comments, so both can be removed without changing how a page renders. Trimming them reduces the number of bytes sent over the wire, which speeds up downloads and, combined with gzip or Brotli, improves Core Web Vitals like Largest Contentful Paint.

This minifier removes comment nodes and collapses runs of whitespace that sit between elements. Crucially, it leaves whitespace inside whitespace-significant elements — pre and textarea, where the CSS white-space property and the HTML spec say spacing matters — exactly as written, so code samples and pre-formatted text survive intact.

Typical savings run 10–30% depending on how much the original was indented and commented. The tool shows the before and after byte counts so you can confirm the reduction. Use it as a final step before deploying static HTML. Minification runs locally, so your markup never leaves the browser.