Performance · JavaScript · CSS · Minification

JS/CSS Minification Checker

Verify that your JavaScript and CSS assets are minified to reduce file size, improve load times, and boost Core Web Vitals scores.

Minification removes whitespace, comments, and shortens variable names — reducing file sizes by 20–60% without changing behaviour.

We check up to 3 JS and 3 CSS files from the homepage using a whitespace-ratio heuristic and .min.* filename detection.

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