Minify CSS to reduce file size, or beautify minified CSS back into readable, indented code.
Typically 20-40% smaller depending on how much whitespace, comments, and formatting the original CSS had.
No, minification only removes whitespace, comments, and unnecessary characters — it doesn't change how the CSS functions.
Yes, use the Beautify button to reformat minified CSS with proper indentation and line breaks for readability.
This tool compresses CSS code by removing unnecessary whitespace, comments, and characters to reduce file size for production use, or reformats minified CSS back into readable, properly indented code for editing and debugging.
Minifying CSS removes everything that's only there for human readability — comments, extra spaces, line breaks, and unnecessary semicolons — without changing how the styles actually work. Smaller CSS files download faster, which directly improves page load time, especially on mobile connections or for sites with render-blocking stylesheets. This is a standard step in most production web deployment workflows.
/* */ is stripped entirely.Minified CSS is efficient for production but nearly impossible to read or edit by hand. When you need to debug, modify, or understand someone else's minified stylesheet, beautifying it back into properly indented, multi-line code makes the structure clear again — restoring line breaks after each rule and property, and adding consistent indentation.
All processing happens directly in your browser using JavaScript — your CSS code is never sent to a server.