CSS Minifier

Paste CSS, optionally keep /*! important */ comments, and download the minified result with size savings.

Designed to process supported files locally in your browser.

How to use CSS Minifier

  1. Paste CSS.
  2. Minify.
  3. Copy or download.

How it works

A conservative tokenizer removes unnecessary whitespace while preserving strings.

Privacy

Your files are processed in your browser and are not uploaded to ToolBoxy servers.

CSS Minifier FAQ

Will it break my CSS?

It is conservative; calc(), URLs and custom properties are left intact inside strings.

Is code uploaded?

No.

Can I keep license comments?

Enable “Keep important comments”.