HTML / CSS / JS Minifier
Minify your code to reduce file size and speed up load times.
How to Minify Your Code
- Select code type — choose HTML, CSS, or JavaScript from the dropdown.
- Paste your code — copy code from your editor and paste it into the input box.
- Click "Minify" — the minified output appears below with the size savings percentage.
- 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.