CSS Minifier

A build pipeline running a dedicated CSS optimiser can safely apply more aggressive transformations than this tool does, because it runs the same optimiser consistently on every build and any behavioural difference gets caught by the project's own testing before it ships. Pasting a stylesheet into a one-off online tool is a different situation: there is no build step re-verifying the output, so a transformation that merges rules or reorders declarations in a way that happens to break one particular page would ship silently. Restricting this tool to whitespace and comment removal — changes that provably cannot alter which declaration wins in the cascade — means the output can be trusted without re-testing the page it came from.

A common case for reaching for this specifically, rather than a build tool, is a one-off need to fit a small stylesheet into a size-constrained field — an inline `<style>` block kept deliberately small, a CSS snippet embedded in an email template, or a style value pasted into a platform with a character limit. For a single file needed once, running an entire build pipeline is overkill; pasting it here and copying the minified result back out is the faster path to the same result.