HTML / CSS / JS Minifier

Minify your code to reduce file size and speed up load times.

Every kilobyte matters for page load speed. This minifier strips whitespace, comments, and unnecessary characters from HTML, CSS, and JavaScript without changing functionality. Smaller files mean faster downloads, lower bandwidth costs, and better Core Web Vitals scores — all important for SEO and user experience.

How to Minify Your Code

  1. Select code type — choose HTML, CSS, or JavaScript from the dropdown.
  2. Paste your code — copy code from your editor and paste it into the input box.
  3. Click "Minify" — the minified output appears below with the size savings percentage.
  4. Copy the result — click "Copy" to copy the minified code to your clipboard, ready to use in production.

Frequently Asked Questions

What is code minification? ▼
Minification removes unnecessary characters from code — whitespace, line breaks, comments, and redundant semicolons — without changing its functionality. Smaller files transfer faster from server to browser, improving page load times and Core Web Vitals scores.
How much can minification reduce file size? ▼
Typical size reductions: CSS — 20-40%, JavaScript — 30-60%, HTML — 10-30%. Results depend on how much whitespace and commentary your code contains. Combined with gzip compression, total transfer sizes can be 70-90% smaller than unoptimized originals.
Is it safe to use minified code in production? ▼
Yes — minified code is functionally identical. Always keep the original unminified source for development and debugging. For production projects, use a build tool (webpack, Vite, Parcel) which handles minification and source maps automatically.
What is the difference between minification and gzip compression? ▼
Minification removes characters from the source code itself (permanent change). Gzip/Brotli compression is applied by the web server at transfer time and is transparently decompressed by the browser. Both should be used together for maximum efficiency.
Should I minify HTML too, or just CSS and JS? ▼
Yes — minifying HTML, CSS, and JS all contribute to faster page loads. HTML minification saves less than CSS/JS but still reduces transfer size. Most modern build tools and CDNs can automatically minify all three file types.

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📖 Further reading: Why Minify HTML, CSS & JavaScript (and How to Do It)