CSS Minifier / Beautifier

Minify CSS to reduce file size or beautify it for readability. All processing happens in your browser.

Input CSS
Output

Minify CSS

Remove comments, whitespace, and unnecessary characters to reduce CSS file size for production deployment.

Beautify CSS

Add proper indentation, line breaks, and formatting to make compressed CSS human-readable and easier to edit.

Size Comparison

See the original and output file sizes with compression ratio percentage to measure optimization impact.

How to Use the CSS Minifier / Beautifier

  1. 1. Paste your CSS code into the Input CSS panel.
  2. 2. Select Minify mode to compress or Beautify mode to format.
  3. 3. Click the action button to process your CSS.
  4. 4. Review the compression ratio to see how much space you saved.
  5. 5. Click Copy to copy the result to your clipboard.

Frequently Asked Questions

What is CSS minification?

CSS minification removes all unnecessary characters from CSS code — comments, whitespace, newlines, and redundant semicolons — without changing functionality. This reduces file size and improves page load speed.

What is CSS beautification?

CSS beautification (also called prettifying) adds proper indentation, line breaks, and spacing to compressed or poorly formatted CSS, making it human-readable and easier to maintain.

How much can CSS minification reduce file size?

Typical CSS minification reduces file size by 15-40% depending on the original formatting. Heavily commented and well-indented CSS files see the largest reductions.

Is my CSS data sent to a server?

No. All minification and beautification is performed locally in your browser using JavaScript. Your CSS code never leaves your device.