CSS & JS Minifier / Beautifier

Minify CSS and JavaScript to reduce file size, or beautify code for readability. See size savings instantly.

What is CSS/JS Minification?

Minification is the process of removing unnecessary characters from CSS and JavaScript code without changing its functionality. This includes whitespace, comments, line breaks, and sometimes shortening variable names. Minified files are significantly smaller, which reduces download times and improves website performance — a key factor in Core Web Vitals and search engine rankings.

This tool minifies CSS and JavaScript code instantly in your browser, and can also beautify (format) minified code back to a readable state.

How to Use This CSS/JS Minifier

Select the language — Choose CSS or JavaScript depending on what code you want to process.

Paste your code — Copy your CSS or JavaScript and paste it into the input editor.

Minify or beautify — Click "Minify" to compress the code, or "Beautify" to format minified code for readability.

Check the size reduction — See the original and minified file sizes to understand the compression ratio.

Copy the result — Use the copy button to grab the processed code.

Common Use Cases

Production optimization — Minify CSS and JS files before deploying to reduce page load times and bandwidth usage.

Debugging minified code — Beautify minified production code to make it readable for debugging purposes.

Performance audits — Check how much size can be saved by minifying your stylesheets and scripts.

Inline code preparation — Minify CSS or JS before inlining it in HTML for critical rendering path optimization.

Frequently Asked Questions

What does minifying CSS and JavaScript do?

Minification removes unnecessary whitespace, comments, and line breaks from CSS and JavaScript code without changing its functionality. This reduces file size, which improves page load times and reduces bandwidth usage.

How do I beautify minified code?

Paste your minified CSS or JavaScript into the editor and click "Beautify". The tool will add proper indentation, line breaks, and spacing to make the code human-readable again.

How much can minification reduce file size?

Minification typically reduces CSS and JavaScript file sizes by 10-30%, depending on how much whitespace and comments are in the original code. Combined with gzip compression, total savings can reach 60-80%.