Format and beautify minified or messy CSS code — fix indentation and structure.
CSS Beautifier is a free online tool that formats and indents minified or messy CSS code into a clean, readable structure. It transforms compressed stylesheets into well-organized code with proper indentation, line breaks, and consistent spacing between selectors and properties. The tool handles all CSS syntax including media queries, keyframe animations, CSS variables (custom properties), nested selectors, and vendor prefixes. It supports configurable indent sizes and preserves the logical order of your declarations while improving visual readability. Properly formatted CSS is essential for maintainability, debugging, and collaboration. When working in teams, consistent code formatting reduces merge conflicts and makes code reviews faster. When debugging, readable CSS helps you quickly locate specific selectors and identify issues with specificity or inheritance. Everything runs entirely in your browser using JavaScript. Your CSS code is never sent to any server, never stored, and never logged. This makes it completely safe for proprietary stylesheets, client projects, and design systems. There are no file size limits, no usage caps, and no registration required. Common use cases include formatting minified CSS from production builds, cleaning up auto-generated styles from CSS preprocessors like Sass or Less, preparing stylesheets for documentation, and making third-party CSS libraries readable for customization. The tool shows statistics including input size, output size, and processing time. You can copy the beautified CSS to your clipboard or download it as a .css file. For the reverse operation — compressing CSS for production — use the CSS Minifier tool.