CSS Minifier & Beautifier
CSS minification removes whitespace, comments, and optimizes syntax to reduce file size. Typical reduction: 30-50%. Transforms: remove spaces around {}, :, and ;, shorten color codes (#ffffff → #fff), remove trailing semicolons, merge duplicate selectors. For example, "body { margin: 0px; padding: 0px; }" becomes "body{margin:0;padding:0}". Use cssnano, clean-css, or build tools. Combine with gzip for 60-70% total reduction. Maintain source files for development.
Minify CSS to reduce file size or beautify/format CSS with proper indentation. Remove comments, whitespace, and merge duplicate selectors. Real-time processing with syntax highlighting.
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CSS Input
1 lines, 0 chars
How to Use
- Enter your value in the input field
- Click the Calculate/Convert button
- Copy the result to your clipboard
Frequently Asked Questions
- What does CSS minification do?
- CSS minification removes unnecessary characters from CSS code without changing its functionality. This includes removing whitespace, line breaks, comments, and unnecessary semicolons. It can also merge duplicate selectors and shorten color values. Minified CSS files are smaller, which means faster page load times.
- Does minifying CSS affect how my website looks?
- No, minifying CSS does not change how your website looks. Minification only removes characters that browsers ignore (like whitespace and comments). The CSS rules and their values remain identical, so the visual output is the same. Always keep your original formatted CSS for development and use the minified version for production.
- How much file size can CSS minification save?
- CSS minification typically saves 10-30% of file size depending on the original formatting. Heavily commented and well-formatted CSS files see the largest savings. Combined with gzip compression on the server, total savings can reach 70-80%. For a 100 KB CSS file, minification alone might save 15-30 KB.
- What is the difference between CSS minification and beautification?
- Minification compresses CSS by removing whitespace, comments, and unnecessary characters to reduce file size for production use. Beautification (also called formatting or prettifying) does the opposite — it adds proper indentation, line breaks, and spacing to make CSS readable for development. Both operations preserve the functionality of the CSS.
- Should I minify CSS for production websites?
- Yes, minifying CSS is a standard best practice for production websites. It reduces file size, decreases page load times, and lowers bandwidth usage. Most build tools (Webpack, Vite, etc.) include CSS minification as part of their production build process. Always keep the unminified source files for development.
- Can I undo CSS minification?
- You can beautify/format minified CSS to make it readable again, but comments and original formatting are lost during minification and cannot be recovered. This is why it is important to always keep your original source CSS files and only use minified versions for deployment.