What is CSS Minify?
A CSS Minifier is a developer tool used to optimize Cascading Style Sheets (CSS) by removing unnecessary characters. CSS files often contain whitespace, indentation, comments, and extra semicolons that help developers read and maintain the code but are ignored by browsers. This tool safely strips these characters, compressing the file size often by 20-40%. Smaller CSS files download faster, which unblocks the rendering of your webpage sooner, leading to a faster First Paint and better SEO rankings. This tool runs locally in your browser, ensuring that your proprietary design tokens and stylesheets are never sent to a remote server.
Input Formats
- Raw CSS code
- CSS3 syntax
- Media queries
Output Results
- Minified CSS string
- Reduced file size
- Copy-ready code
Key Features
Who is this for?
Website Optimization
Web developers minifying main.css files before deployment to improve Google PageSpeed Insights scores.
CMS Management
WordPress or Shopify developers compressing custom CSS snippets to reduce theme bloat.
Email Design
Designers inlining and minifying CSS for HTML emails to ensure compatibility and low file size.
How to Use
Paste your CSS code into the editor.
Click 'Minify' to compress the code.
Use 'Beautify' to restore readability if needed.
Copy the optimized CSS to your project.
Examples
Input
body {
background-color: #ffffff;
color: #333333;
/* Main font */
font-family: sans-serif;
}Output
body{background-color:#fff;color:#333;font-family:sans-serif}Common Errors
- Missing closing braces
- Invalid property values
- Broken media query syntax
Code Examples
Node.js (cssnano)
const cssnano = require('cssnano');
cssnano.process(css).then(result => {
console.log(result.css);
});