CSS Minifier
CSS minification reduces textual overhead while preserving the intended stylesheet rules in common cases.
Quick answer
Minify CSS by removing common comments and unnecessary whitespace for compact stylesheets. The core operation is designed for quick browser-based use without an account.
How to use this tool
- Paste css
- Run the minifier
- And compare the output in a test environment before deployment.
Common errors and things to check
Whitespace inside strings and certain CSS constructs has meaning. Keep source CSS and validate the result with your build pipeline.
Common use cases
- Reducing stylesheet size
- Preparing test assets
- Inspecting generated CSS
Privacy and local processing
Core processing for this tool is designed to happen in your browser. The page does not intentionally upload ordinary tool input to a DataToolBase server. Do not paste passwords, private keys, access tokens, personal data, or other sensitive secrets unless you have verified the security requirements for your use case.
Frequently asked questions
Does CSS minification improve performance?
It can reduce transferred text size, but real-world performance also depends on compression, caching, HTTP protocols, and other assets.
Should I keep the original CSS?
Yes. Keep readable source and treat minified CSS as a generated artifact.