CSS Formatter & Beautifier

What Is a CSS Formatter?

A CSS formatter is a developer tool that takes raw, minified, or messy CSS stylesheets and reformats them with proper indentation, line breaks, and consistent spacing. Our free CSS formatter and beautifier handles formatting, minification, and syntax highlighting — all in your browser with complete privacy. Whether you are debugging production stylesheets, cleaning up code exported from design tools, or preparing CSS for documentation, this tool gives you clean, readable output in seconds.

How to Use This CSS Formatter

Paste your unformatted or minified CSS into the input editor. Choose your mode — Beautify for readable formatting or Minify for compressed output. Adjust indentation size, selector newlines, and spacing preferences. Click "Format CSS" or enable auto-format to see the result instantly. Copy the formatted output or download it as a .css file.

Key Features

• CSS beautification — proper indentation, line breaks, and consistent spacing
• CSS minification — strip whitespace and comments for production-ready compressed output
• Customizable indentation — 2, 4, or 8 spaces, or tabs
• Selector-per-line — optionally place each CSS selector on its own line
• Syntax highlighting — color-coded selectors, properties, values, and comments
• File upload and download — drag-drop .css files and save formatted output

Supported CSS Features

The formatter handles all standard CSS including nested media queries, @keyframes animations, @font-face declarations, @supports rules, @import and @charset directives, CSS custom properties (variables), and complex selectors with pseudo-classes and pseudo-elements. It preserves the semantic structure of your CSS while applying consistent formatting rules. Comments are preserved during beautification and removed during minification.

Common Use Cases

• Frontend developers — formatting messy or minified stylesheets for code review
• Designers — cleaning up CSS exported from Figma, Webflow, or Framer
• DevOps engineers — formatting auto-generated CSS from build pipelines
• Students — learning CSS structure through properly formatted examples
• Technical writers — preparing CSS code snippets for documentation and blog posts

Tips and Best Practices

Use 2-space indentation for CSS in most JavaScript projects — it matches the ecosystem convention and keeps stylesheets compact. When comparing two versions of a CSS file, format both with the same settings first to eliminate noise from whitespace differences. Use the minify mode to check file size savings before and after optimization. For production deployment, always minify CSS to reduce page load time — the formatter shows you exact byte savings. If your CSS includes vendor prefixes, the formatter preserves them correctly without reordering. For very large stylesheets (100KB+), the tool may take a moment to process — this is normal for client-side formatting.