CSS Formatter

CSS Formatter is a free browser-based tool that instantly beautifies messy or minified CSS code into clean, human-readable format with consistent indentation and line breaks. Whether you have received minified CSS from a build pipeline, copied styles from a website, or just want to clean up a sprawling stylesheet, this tool reformats it in one click.

Cascading Style Sheets (CSS) are often minified in production environments to reduce file size and improve page load speed. Minification strips all whitespace, comments, and line breaks, making the code impossible to read. When debugging, auditing, or learning from production CSS, developers need to reverse this process — restoring structure and readability.

The formatter parses your CSS and applies consistent indentation rules: each rule block is placed on its own line, properties are indented inside selectors, and closing braces are aligned with their opening selectors. Media queries and nested at-rules like @keyframes, @supports, and @font-face are also formatted correctly.

Front-end developers use CSS formatters to audit third-party stylesheets, debug minified CSS from browser DevTools, and ensure consistent coding style across a team. Designers use them to understand the CSS behind templates or themes. Students use them to learn from real-world CSS by making it legible.

The tool also supports minification — the reverse process of removing unnecessary whitespace to produce compact CSS ready for production deployment. This is useful when you have written clean CSS and want to reduce the file size without setting up a full build pipeline like Webpack or Vite.

Because CSS formatting is a purely syntactic operation, no external server is needed. All processing happens in your browser using JavaScript. Your stylesheets never leave your device, making this tool safe to use with proprietary or client CSS codebases.

The formatter handles modern CSS features including custom properties (CSS variables), pseudo-selectors, pseudo-elements, attribute selectors, and complex combinators. It preserves comments when beautifying so you do not lose important documentation embedded in the stylesheet.