CSS Formatter

CSS Formatterについて

The CSS Formatter is a free, browser-based tool for instantly beautifying or minifying your CSS stylesheets. Raw CSS from production bundles or third-party themes is often minified into a single unreadable line. Pasting it into this formatter immediately adds proper indentation, places each property declaration on its own line, and separates rule blocks with blank lines so the structure is easy to navigate. Conversely, when you are preparing CSS for production deployment, the minify mode strips all whitespace, line breaks, and comments — often reducing file size by 30–60 % — which directly improves page load speed. The formatter correctly handles nested braces for at-rules like @media, @keyframes, and @supports. The comment-stripping feature removes both single-line and block comments during minification, keeping only the code browsers need to parse. Indentation can be set to 2 or 4 spaces to match your project's style guide. Because all operations run client-side, your CSS code is never uploaded to any server — making this tool safe for proprietary design systems and internal stylesheets.

CSS Formatterの使い方

1. Paste your CSS code into the left input panel.
2. Choose your preferred indentation size (2 or 4 spaces) from the dropdown.
3. Click "Beautify" to add readable indentation and line breaks, or "Minify" to compress the CSS for production.
4. Review the output in the right panel — errors or unexpected tokens will be visible immediately.
5. Click "Copy" to copy the formatted CSS to your clipboard.

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