What does CSS minification do?

CSS minification removes comments, unnecessary whitespace, line breaks, and redundant characters from your CSS code. This reduces file size, leading to faster page load times and better web performance.

Will minification break my CSS?

No, minification only removes unnecessary characters. It preserves all CSS rules and functionality. The minified code produces the exact same rendering as the original.

Is this tool free to use?

Yes, the CSS Minifier is completely free with no usage limits. All processing happens in your browser — your code is never uploaded to any server.

CSS圧縮ツール

CSSコードをオンラインで圧縮・整形します。コメントや空白を削除し、ファイルサイズを即座に削減します。

入力

使い方

CSSコードをオンラインで圧縮・整形します。コメントや空白を削除し、ファイルサイズを即座に削減します。

1Paste your CSS code into the input field.
2Click 'Minify' to compress or 'Format' to beautify.
3View the size reduction percentage instantly.
4Copy the result with one click to use in production.

主な機能

Remove comments, whitespace, and unnecessary characters
Shows original vs minified size with savings percentage
Beautify/format mode for readable CSS
100% client-side — your code never leaves the browser

よくある質問

詳しく読む

CSS Minifier Guide — Optimize Your Stylesheets for Web Performance