About the CSS Minifier
Remove comments, line breaks and unnecessary spaces from CSS for faster page loads.
CSS Minifier
Minify CSS by removing comments and whitespace, and see the size saving.
- Paste your input
- Choose the options
- Copy the output
Runs in your browser. Your data and files never leave your device.
Frequently asked questions
Is this as good as a build tool?
It handles whitespace and comments safely. Build tools can go further (merging rules, shortening colours).
How much smaller will my CSS get?
Typically 15–30% before compression, depending on comments and whitespace. Servers usually gzip CSS too, which shrinks both versions further.
Is minification safe?
Removing comments and whitespace doesn’t change how rules apply. Keep your unminified source for editing.
Related tools
- CSS FormatterBeautify minified CSS into readable, indented rules.
- JSON MinifierMinify JSON by removing whitespace and line breaks, and see how much smaller it gets.
- CSS Gradient GeneratorDesign linear, radial and conic CSS gradients visually and copy the code.
- JSON Formatter & BeautifierFormat, beautify and pretty-print JSON with your choice of indentation, and pinpoint syntax errors.
- Password GeneratorCreate strong, random passwords or memorable passphrases, with a strength meter — generated on your device.
- Microphone TestCheck your microphone is working before a call: see the input level live and record a 5-second clip to hear yourself.