CSS Minifier / Beautifier

How to Use the CSS Minifier / Beautifier

This free online CSS tool lets you minify or beautify your CSS code instantly. Choose "Minify" mode to compress your CSS by removing comments, whitespace, and unnecessary characters. Choose "Beautify" mode to format compressed CSS with proper indentation and line breaks for readability.

CSS Minification

• Removes all CSS comments (/* ... */)
• Collapses multiple whitespace characters into single spaces
• Removes unnecessary spaces around selectors and properties
• Removes trailing semicolons before closing braces
• Shows character count comparison and size savings percentage

CSS Beautification

The beautify mode transforms minified CSS into a well-formatted, human-readable format. It adds proper line breaks after opening braces, closing braces, and semicolons, then applies consistent indentation based on your chosen indent size (2 or 4 spaces). This is essential for debugging and maintaining CSS stylesheets.

Why Minify CSS?

Minified CSS files load faster because they contain fewer bytes. Removing comments, whitespace, and redundant characters can reduce CSS file size by 20-50%. This directly improves page load times, which is important for user experience and SEO rankings. Most production websites serve minified CSS alongside gzip or Brotli compression.

CSS圧縮・整形ツールについて

CSSコードをワンクリックで圧縮(ミニファイ)または整形(ビューティファイ)できるツールです。圧縮モードではコメントや空白を除去しファイルサイズを削減、整形モードではインデントと改行を追加して可読性を向上させます。処理は全てブラウザ内で完結します。