CSS Minifier – Compress CSS Code Online Free

About the CSS Minifier

The CSS Minifier shrinks your stylesheet by removing comments, extra whitespace, and empty lines, without changing how your styles are applied. Paste your CSS, choose which optimizations to apply, and get a compressed version instantly, along with a clear breakdown of exactly how many bytes you saved. If you’re cleaning up markup as well, pair this with the HTML Minifier for a fully optimized page.

This tool is built for developers and website owners looking to reduce CSS file size and speed up page load times before deployment. It safely compresses selectors, properties, and values while preserving !important declarations, making it a quick way to prep stylesheets for production. Once your CSS is minified, you can check color values used throughout with the Color Converter.

We tried this tool with both small CSS files and larger production stylesheets to verify that only unnecessary characters are removed while the original styling remains unchanged.

How to Use the CSS Minifier

• Paste your CSS code into the CSS Input box.
• Enable Remove CSS Comments to strip out /* comments */.
• Enable Remove Extra Whitespace to collapse spaces and tighten up selectors and properties.
• Enable Remove Empty Lines to eliminate blank lines from the code.
• Click Minify CSS to generate the compressed result.
• Review the Original Size, Minified Size, and Saved stats.
• Click Copy Code or Download .css to save your minified stylesheet.

Example Usage

Input:

.example {
  color: red;
  margin: 10px;
}

Output (all options enabled):

.example{color:red;margin:10px}

The comment structure, indentation, and line breaks are all removed while the styling behavior stays exactly the same.

Before publishing your project, you can also format your code with the CSS Beautifier, optimize your markup using the HTML Minifier, or compress your scripts with the JS Minifier.

Frequently Asked Questions