What Is a CSS Minifier?

A CSS minifier strips unnecessary whitespace, comments, and formatting from your stylesheet without changing how it functions — reducing file size so browsers download and parse it faster, which directly helps page load speed and Core Web Vitals.

How to Use the CSS Minifier

• Paste your CSS code
• Click Minify
• Copy the compressed output and deploy it in place of the original file

Key Features

• Removes whitespace and comments — smaller file, same functionality
• Instant processing — no size limit for typical stylesheets

Who Uses This Tool

Developers minify CSS as part of their deployment/build process. Site owners without a build pipeline use it to manually optimize stylesheets.

Frequently Asked Questions

Should I keep an unminified copy?
Yes — always keep your original, readable CSS as the source file for future edits, and only deploy the minified version to production.

Is this tool free?
Yes, minifying CSS is completely free.