CSS Minifier
Compress your CSS stylesheets by removing whitespace, comments, redundant semicolons, and unnecessary units to produce lean, production-ready CSS. Smaller CSS files mean faster page loads, better performance scores, and reduced bandwidth consumption — especially important for mobile users on slower connections. This free CSS minifier is perfect for web developers, designers, and front-end engineers who want to quickly optimize stylesheets before deploying to production. Works with any CSS including vanilla CSS, SCSS output, Bootstrap overrides, Tailwind custom classes, and framework stylesheets.
CSS Minifier
Remove comments and whitespace from CSS to reduce file size.
How to Use CSS Minifier
- 1Paste your CSS stylesheet into the input area
- 2Click "Minify CSS" to compress the code
- 3View the output size and percentage reduction
- 4Click "Copy" to copy the minified CSS
- 5Replace your original stylesheet with the minified version for production
About CSS Minifier
Compress your CSS stylesheets by removing whitespace, comments, redundant semicolons, and unnecessary units to produce lean, production-ready CSS. Smaller CSS files mean faster page loads, better performance scores, and reduced bandwidth consumption — especially important for mobile users on slower connections. This free CSS minifier is perfect for web developers, designers, and front-end engineers who want to quickly optimize stylesheets before deploying to production. Works with any CSS including vanilla CSS, SCSS output, Bootstrap overrides, Tailwind custom classes, and framework stylesheets.
Your Privacy is Protected
CSS Minifier runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.
Frequently Asked Questions
What does CSS minification remove?
CSS minification removes whitespace, line breaks, comments, trailing semicolons, and unnecessary units (like 0px becoming 0). It also merges duplicate selectors in some cases.
Will minified CSS work in all browsers?
Yes. Minification only removes non-functional characters. The resulting CSS is semantically identical and works in all modern and legacy browsers.
Should I minify CSS in development?
No — keep formatted CSS during development for readability and debugging. Only minify for production deployments. Most build tools (Webpack, Vite, Parcel) can automate this step.
How much size reduction can I expect?
CSS files typically reduce by 20–40% through minification. Files with lots of comments or generated code (from preprocessors) can see even larger reductions.
Why Use This Tool?
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