CSS Optimizer

Optimize and minify CSS code to reduce file size.

This tool processes all data locally on your device.

Input

Enable restructuringRestructure rearranges CSS rules to improve readability and maintainability.

Format outputFormat the output CSS with Prettier.

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Output

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Readme

Tool description

CSS Optimizer is a free CSS optimizer tool that helps you compress CSS file online to make your stylesheets load faster on websites. This powerful tool shows you how to compress CSS files by intelligently removing unnecessary characters, combining similar rules, and optimizing your code while preserving its functionality. Simply paste your CSS, adjust the settings to your preference, and get smaller, more efficient CSS instantly with our tidy CSS online solution.

Features

Restructuring option to rewrite rules for better compression
Comment preservation options (keep all, keep first, or remove all)
Formatting option using Prettier for readable output

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Tool info

Created

Mar 15, 2025

Last updated

Oct 23, 2025

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Powered By

www.npmjs.com/package/csso www.npmjs.com/package/prettier

Embed

Embed this tool anywhere for free. Need help? Check out our guide.

<iframe src="https://rapidtoolset.com/en/embed/css-optimizer" title="CSS Optimizer - rapidtoolset.com" style="border:0;width:100%;min-height:600px;" loading="lazy"></iframe>
<p>Powered by RapidToolSet: <a href="https://rapidtoolset.com/en/tool/css-optimizer" target="_blank">https://rapidtoolset.com/en/tool/css-optimizer</a></p>

HTML

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Disclaimer

The tools provided on this website are designed to assist users in solving various problems. While we strive to ensure that the tools are accurate and effective, we do not guarantee or warrant that the output of any tool will be 100% accurate or error-free. The results generated by these tools are provided as-is and should be used with caution. We recommend that users verify any important information or results with additional resources or professional advice, as we cannot be held responsible for any consequences arising from the use of these tools. By using this website, you agree to assume all risks associated with the accuracy and use of the results provided.