CSS Minifier & Beautifier

Input CSS0 bytes / 0 lines
Minified Output0 bytes / 0 lines
Minified CSS will appear here...

What This Tool Does

CSS Minifier & Beautifier is built for deterministic developer and agent workflows.

Minify or beautify CSS with size reduction stats and comment removal options.

Use How to Use for execution steps and FAQ for constraints, policies, and edge cases.

Last updated:

This tool is provided as-is for convenience. Output should be verified before use in any production or critical context.

Agent Invocation

Best Path For Builders

Browser workflow

Runs instantly in the browser with private local processing and copy/export-ready output.

Browser Workflow

This tool is optimized for instant in-browser execution with local data handling. Run it here and copy/export the output directly.

/css-minifier/

For automation planning, fetch the canonical contract at /api/tool/css-minifier.json.

How to Use CSS Minifier & Beautifier

  1. 1

    Paste CSS code

    Enter your CSS rules (from stylesheets or inline styles). Supports nested selectors, media queries, and vendor prefixes.

  2. 2

    Minify or beautify

    Click 'Minify' to strip whitespace and comments, reducing file size. Or 'Beautify' to format compressed CSS with indentation.

  3. 3

    Preserve critical features

    The tool intelligently keeps media queries, keyframe animations, and vendor prefixes intact while removing only unnecessary whitespace.

  4. 4

    Handle color optimization

    Optionally convert colors to shorthand (#fff instead of #ffffff) and remove duplicate declarations.

  5. 5

    Export or copy

    One-click copy to clipboard or download as a .css file. View size savings and gzip compression estimate.

Frequently Asked Questions

What is CSS Minifier & Beautifier?
CSS Minifier & Beautifier compresses CSS by removing whitespace and comments, or reformats minified CSS into readable code. It displays size reduction stats and supports optional comment removal.
How do I use CSS Minifier & Beautifier?
Paste your CSS into the editor and click Minify to compress it or Beautify to format it. Toggle comment removal on or off, and view the size reduction percentage in the output stats.
Is CSS Minifier & Beautifier free?
Yes. This tool is free to use with immediate access—no account required.
Does CSS Minifier & Beautifier store or send my data?
No. All processing happens entirely in your browser. Your CSS code never leaves your device — nothing is sent to any server.
Should I minify CSS for production?
Yes. Minifying CSS removes unnecessary whitespace and comments, reducing file size and improving page load times. Most build tools like Vite, Webpack, and PostCSS can automate this, but this tool is handy for quick one-off minification.