HTML Minifier
Minify HTML by removing unnecessary whitespace and comments. Runs entirely in your browser.
Why Minify HTML? — Reduce File Size and Improve Core Web Vitals
HTML minification removes unnecessary characters from HTML source code — whitespace, line breaks, comments, and optional tags — without changing the rendered output. Smaller HTML files download faster, reduce Time to First Byte (TTFB), and improve Largest Contentful Paint (LCP), directly impacting your Google Core Web Vitals scores and SEO ranking.
What HTML Minification Removes
- Whitespace and line breaks — Indentation, blank lines, and extra spaces between tags
- HTML comments —
<!-- ... -->comments used during development - Redundant whitespace — Multiple consecutive spaces collapsed to a single space
How Much Does HTML Minification Save?
Typical savings range from 10—30% of the original file size, depending on code formatting style. Well-indented HTML with comments can see even higher reduction. Combined with gzip/Brotli compression on the server, minified HTML can be 70—90% smaller than the original source delivered to browsers.
HTML Minification Best Practices
- Minify in your build pipeline — Use tools like html-minifier-terser, HTMLMinifier, or Webpack html-loader in CI/CD
- Keep source files unminified — Always minify from the original source; never edit minified HTML directly
- Combine with server compression — Enable gzip or Brotli compression on your web server (Nginx, Apache, CloudFlare)
- Preserve
<pre>and<code>whitespace — Minifiers should not collapse whitespace inside preformatted text blocks
Frequently Asked Questions
No. The minifier preserves the content inside <script> and <style> tags. Only whitespace between HTML tags and HTML comments are removed. Inline JavaScript and CSS function exactly the same after minification.
No. HTML minification only removes characters that don't affect rendering — extra whitespace, line breaks, and comments. The browser produces the exact same visual output from minified HTML. Whitespace inside <pre> and <code> tags is preserved.
Yes. The minifier handles embedded SVG markup correctly, removing unnecessary whitespace between SVG elements while preserving the structure and attributes. Your SVG graphics will render identically after minification.
No. All minification runs entirely in your browser using JavaScript. Your HTML code never leaves your device — no data is transmitted to any server. This makes it safe for minifying pages containing proprietary code, internal URLs, or sensitive content.
Yes. Minification and server compression (gzip/Brotli) complement each other. Minification reduces the raw file size by 10-30% by removing redundant characters. Server compression then encodes the remaining bytes more efficiently. Together they deliver the smallest possible transfer size and fastest page loads.