Dev Tools
CSS Minifier
The CSS Minifier strips comments, extra whitespace, and unnecessary line breaks from a CSS file, shrinking it down for production without changing how it renders. It's useful for developers who want a smaller stylesheet to ship, or anyone tidying up CSS pulled from a template or tutorial.
Minification happens instantly using JavaScript running in your browser, so your stylesheet is never uploaded to a server — you can safely paste in CSS from an internal or unreleased project.
How to Use the CSS Minifier
- Open the CSS Minifier tool.
- Paste your CSS into the input box.
- Click Minify to strip comments and whitespace.
- Copy the minified CSS.
Frequently Asked Questions
Does minifying change how my CSS looks or behaves?
No — it only removes comments, whitespace, and line breaks, leaving all selectors, properties, and values exactly as you wrote them.
Is my CSS uploaded anywhere when I minify it?
No, the minification runs entirely client-side in your browser, so your stylesheet never leaves your device.
How much smaller will my file get?
It depends on how much whitespace and how many comments your original file has, but a typical hand-written stylesheet often shrinks noticeably once formatting is stripped out.