CSS 在线格式化工具

What Is CSS Formatter?

CSS Formatter is a free online tool that cleans up and restructures CSS stylesheets. In Beautify mode it adds consistent indentation, puts each declaration on its own line, and separates rules with blank lines so your CSS is easy to read and maintain. In Minify mode it strips all whitespace and comments to produce the smallest possible CSS file for production deployment.

How to Use CSS Formatter

1. Choose Beautify to format CSS with indentation, or Minify to compress it.
2. Paste your CSS into the input panel, or click Load Sample to try an example.
3. The formatted output appears instantly in the right panel.
4. Click Copy to copy the result to clipboard.

Features

• Beautify mode with 2-space or 4-space indentation
• Minify mode strips whitespace and CSS comments
• Handles selectors, pseudo-classes, media queries, and keyframes
• Copy result to clipboard
• Runs entirely in your browser — zero data uploaded

FAQ

What is CSS Formatter?

CSS Formatter is a free online tool that either beautifies CSS with consistent indentation and line breaks, or minifies it by removing whitespace and comments to produce the smallest possible file for production.

What is the difference between beautify and minify CSS?

Beautify formats CSS with one rule per line and consistent indentation so it is easy to read and edit. Minify removes all whitespace and comments to reduce file size and improve page load speed.

Is my CSS sent to a server?

No. All formatting happens entirely in your browser. Your CSS never leaves your device.