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CSS Minifier

Minify CSS code online. Remove comments and whitespace to reduce file size.

How to Use CSS Minifier

1

Paste your CSS code

Copy your CSS from a stylesheet file, browser DevTools, or code editor and paste it into the minifier input area.

2

Review minification options

The minifier removes whitespace, comments, and redundant characters by default. All CSS functionality is preserved during compression.

3

Minify the CSS

Click Minify to compress the stylesheet. The tool displays the minified output with a size comparison showing the percentage reduction achieved.

4

Deploy the minified CSS

Copy the compressed CSS and use it in your production environment. Link it in your HTML or replace your existing stylesheet for faster page loads.

About CSS Minifier

CSS minifier online — compress CSS code by removing whitespace, comments, and redundant characters for production-ready stylesheets. This free CSS minification tool reduces file size by 20-50% while preserving all styling rules, media queries, and animations. Essential for improving page load speed, reducing bandwidth costs, and boosting Core Web Vitals scores. All processing runs in your browser so your stylesheets remain private.

Key Features

  • Minify CSS by removing whitespace, comments, and unnecessary semicolons
  • Reduce CSS file size by 20-50% for faster page loads and better performance
  • Preserve all selectors, properties, media queries, and keyframe animations
  • Shorten color values and combine shorthand properties for maximum compression
  • Handle CSS3 features including custom properties, grid, and flexbox
  • One-click copy of minified CSS ready for production stylesheets

Frequently Asked Questions

How to minify CSS online for free?▾
Paste your CSS code into the editor and click Minify. The tool removes all unnecessary whitespace, comments, and redundant characters instantly. Copy the compressed output for production use. No signup needed.
How to compress CSS without breaking styles?▾
The minifier only removes non-essential characters like whitespace, comments, and trailing semicolons. All selectors, properties, values, media queries, and animations remain functionally identical.
How to reduce CSS file size for better performance?▾
CSS minification typically achieves 20-50% size reduction. For large stylesheets with extensive comments and formatting, savings can be even greater. Combine with server-side gzip for maximum benefit.
How to minify CSS with media queries and animations?▾
The minifier preserves all CSS3 features including media queries, @keyframes, CSS custom properties (variables), grid, and flexbox declarations while removing unnecessary whitespace.
How to minify CSS for WordPress or website themes?▾
Copy your theme's CSS, paste it into the minifier, and use the compressed output. This reduces stylesheet loading time, improving both user experience and SEO rankings.
How to improve page speed with CSS minification?▾
Smaller CSS files download faster, reducing render-blocking time. This improves First Contentful Paint (FCP) and Largest Contentful Paint (LCP) metrics that Google uses for search rankings.
How to undo CSS minification?▾
Minification is a one-way process for the output. Always keep your original unminified CSS source files for editing. Use a CSS formatter to add indentation back to minified CSS if needed.