CSS Minifier - Optimize Your Stylesheets
Free, powerful CSS minification tool to reduce file sizes, improve performance, and enhance website speed. Multiple compression levels and advanced optimization options.
Advertisement
Ad blocked by browser
CSS Minifier
Quick Examples
Click an example to load it into the minifier
Examples of Real-World Usage
6 real-world examples
Website Performance Optimization
Reduce CSS file sizes to improve page load times and Core Web Vitals scores for better SEO rankings.
Production Build Preparation
Prepare CSS files for production deployment by removing unnecessary characters and optimizing code structure.
Bandwidth Reduction
Minimize bandwidth usage and server costs by reducing CSS file sizes, especially important for high-traffic websites.
CDN Optimization
Optimize CSS files before uploading to CDNs to maximize caching efficiency and reduce delivery costs.
Code Cleanup
Clean up CSS files by removing comments, empty rules, and redundant code for better maintainability.
Mobile Optimization
Reduce CSS file sizes for mobile users to improve loading speeds on slower connections and limited data plans.
Advanced CSS Minification Features
Our CSS minifier provides comprehensive optimization tools to reduce file sizes and improve website performance.
How to Use
Simple 4-step process
Step 1
Paste your CSS code directly into the input area or upload a CSS file using the upload button. The tool accepts standard CSS files (.css extension).
Step 2
Click the Settings button to customize minification options. Choose your compression level (Light, Medium, or Aggressive) and toggle specific optimization features like comment removal, color optimization, and more.
Step 3
View the minified CSS in real-time. Check the statistics panel to see file size reduction, compression percentage, and savings. Use side-by-side or tabbed view modes for comparison.
Step 4
Copy the minified CSS to your clipboard with one click, or download it as a new CSS file. The tool automatically generates optimized, production-ready CSS.
Frequently Asked Questions
Everything you need to know about our process, pricing, and technical capabilities.
See Full FAQCSS minification is the process of removing unnecessary characters (whitespace, comments, etc.) from CSS files to reduce file size. It's important because: Reduces file size, leading to faster page load times Improves website performance and user experience Decreases bandwidth usage and server costs Enhances SEO rankings through better page speed metrics
No, our CSS minifier is designed to preserve all CSS functionality while removing only unnecessary characters. The minified CSS will behave exactly the same as your original CSS, just with a smaller file size. However, we recommend testing the minified CSS in your development environment before deploying to production.
Each level provides different compression: Light: Removes extra whitespace and newlines while maintaining basic readability Medium: Removes all whitespace and newlines, standard minification Aggressive: Maximum compression with all optimizations enabled for smallest file size
Yes! The tool provides granular control over optimization features. You can toggle options like comment removal, empty rule elimination, color optimization, font weight conversion, vendor prefix removal, !important removal, and more. This allows you to customize the minification process based on your specific needs.
Yes, our CSS minifier fully supports CSS3 and modern CSS features including custom properties (CSS variables), flexbox, grid, animations, media queries, and more. All modern CSS syntax is preserved during the minification process.
Currently, the tool processes one CSS file at a time. For multiple files, you can upload and minify them individually, or combine them into a single file first. We recommend minifying each file separately to maintain better organization and easier debugging.
File size reduction varies depending on your CSS. Typically, you can expect 20-50% reduction with standard minification, and up to 60-70% with aggressive optimization settings. The actual reduction depends on factors like the amount of whitespace, comments, and redundancy in your original CSS.
Yes, the minified CSS is production-ready and can be used directly in your live website. However, we always recommend keeping a backup of your original CSS file and testing the minified version thoroughly before deploying to ensure everything works as expected.
Still have questions?
Can't find what you're looking for? We're here to help you get the answers you need.