Online CSS Minifier & Stylesheet Optimizer

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Programmatic Code Snippets: Minify CSS

How to implement Minify CSS programmatically in Python, Node.js, PHP, and CLI

CLI & API Syntax

Minify CSS using rcssmin in Python

# pip install rcssmin
import rcssmin

css = """
.card {
 margin: 10px;
 padding: 20px;
}
"""
minified = rcssmin.cssmin(css)
print(minified)

Minify CSS using clean-css in Node.js

// npm install clean-css
const CleanCSS = require('clean-css');

const css = '.card { margin: 10px; padding: 20px; }';
const output = new CleanCSS().minify(css);
console.log(output.styles);

Minify CSS using regex in PHP

<?php
$css = ".card { margin: 10px; padding: 20px; }";
// Strip comments and extra whitespace
$css = preg_replace('!/\*.*?\*/!s', '', $css);
$css = preg_replace('/\s*([{}|:;,])\s+/', '$1', $css);
echo trim($css);

Minify CSS via clean-css CLI

npx clean-css-cli -o style.min.css style.css

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