⚡ Developer Tools

Free CSS Minifier & Beautifier

Minify CSS to reduce file size or beautify compressed CSS for readability. Remove comments, whitespace, and redundant code — 100% client-side.

📁 Drop .css file here

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Smart Compression

Removes comments, whitespace, and shortens colour values.

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Beautify Mode

Formats minified CSS with proper indentation and line breaks.

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Size Comparison

Shows original vs output size with exact savings percentage.

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100% Private

Runs entirely in your browser. No data sent to servers.

How to Use This CSS Minifier

Paste or Upload

Paste your CSS or drag & drop a .css file into the input panel.

Minify or Beautify

Click Minify to compress or Beautify to format with indentation.

Copy or Download

Copy the result or download as a .css file. Check the size savings.

What Does CSS Minification Do?

Removes comments — strips all block comments that add bytes in production. Eliminates whitespace — collapses spaces, tabs, and line breaks. Optimises values — shortens #ffffff to #fff, removes unnecessary units (0px → 0), and strips trailing semicolons before closing braces.

Minified CSS loads faster, reduces bandwidth, and improves Core Web Vitals. Typically saves 15–40% file size depending on comment density and formatting.

Is This Tool Free and Private?

Yes. Runs 100% in your browser. No data sent to any server. Works offline.

Frequently Asked Questions

No. Minification only removes whitespace and comments — it doesn't change selectors, properties, or values. The output is functionally identical.

Typically 15–40% depending on whitespace and comment density in your original CSS.

No. Everything runs in your browser. No data is ever transmitted or stored.