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CSS Minifier Online Tool

Free online tool to minify css code to reduce file size. No registration required - secure, fast, and easy to use. Built with privacy in mind.

css
minifier
optimizer

Minification Options

Strip all comments from CSS

Remove unnecessary spaces

Combine all lines into one

Convert font-weight names to numbers

Convert colors to shortest form

Compression Statistics

Statistics will appear after minification.

About CSS Minifier & Optimizer

This free online CSS minifier and optimizer tool helps you reduce CSS file size by removing unnecessary characters, comments, and whitespace. Essential for web performance optimization and faster page loading.

Key Features

  • Advanced minification to remove comments, whitespace, and line breaks
  • Color compression to convert hex colors to shortest form (#RRGGBB to #RGB)
  • Font weight optimization with numeric value conversion
  • Customizable optimization options for selective processing
  • Compression statistics showing exact space savings
  • Built-in CSS syntax validation for error detection
  • File upload and download capabilities for batch processing
  • Copy to clipboard or download results as .css files

Use Cases

  • Production deployment - minify CSS before going live
  • Performance optimization - reduce page load times
  • CDN preparation - optimize files for content delivery networks
  • Mobile optimization - reduce data usage for mobile users
  • Build process integration - automate minification in pipelines
  • Bandwidth optimization - reduce server transfer costs

Supported Formats

CSS (Cascading Style Sheets)
Minified CSS Output
CSS3 Properties and Values
Media Queries
CSS Comments
Hex Color Codes

Related Keywords

css minifier
css optimizer
css compressor
minify css
css compression
web performance
css tool
optimize css
reduce css size
css minify online

Performance Tip

CSS minification can typically reduce file sizes by 20-40%. For best results, combine minification with gzip compression on your web server for even greater size reductions.

Privacy & Security

All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.

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