Home/Developer Tools/CSS Minifier & Beautifier
Developer Tool

CSS Minifier & Beautifier

Minify CSS to shrink file size, or beautify compressed CSS back into readable, indented formatting — instantly in your browser.

Advertisement
CSS Minifier & Beautifier
Minify CSS to reduce file size or beautify compressed CSS for readability
Input CSS
Output
Output appears here...

Disclaimer. This tool is provided for informational purposes only. Always keep an unminified source copy of your CSS for future editing. Read full disclaimer →

About Code Minifier

Code minification removes all unnecessary characters from source code - whitespace, line breaks, comments, and long variable names - without changing functionality. Minified JavaScript files typically shrink by 30-60%; CSS files by 20-40%. This reduces page load time, bandwidth consumption, and server costs. Every kilobyte removed improves Time to First Byte (TTFB) and Core Web Vitals scores.

Minification vs. compression: minification changes the content; compression (gzip, Brotli) reduces the transfer size without changing content and happens at the server level. Both are complementary - minify first, then compress. Minified code is unreadable, so always keep source files for development and serve only minified files in production. Build tools like webpack, Vite, Parcel, and esbuild automatically minify code as part of the production build process. Use this tool for quick manual minification of individual files.

Frequently Asked Questions

Minification strips comments, collapses whitespace and line breaks into single spaces, and removes unnecessary spacing around braces, colons, and semicolons — all without changing what the CSS does.
Typical CSS files shrink by roughly 20-40% after minification, depending on how much whitespace and how many comments the original file contained. The tool shows you the exact character count saved and percentage after each run.
Minifying compresses CSS for production use by removing all unnecessary characters. Beautifying does the reverse — it takes compressed, hard-to-read CSS and reformats it with line breaks and indentation for easier editing and debugging.
No. Minification changes the actual source content (removing whitespace/comments), while gzip or Brotli compression reduces transfer size at the server/network level without altering the content. Both are typically used together: minify first, then serve with compression enabled.
Advertisement

Related: HTML Encoder/Decoder, Markdown Preview, All Developer Tools