Remove Duplicate CSS Online

Remove Duplicate CSS Online is a free browser-based utility from WebUtility.io that scans pasted CSS and removes redundant duplicate entries, returning both the cleaned stylesheet and a separate list of the styles it stripped out. It's aimed at web developers and designers who want smaller, faster-loading, easier-to-maintain stylesheets without installing build tools. Its main differentiator is that it shows the removed styles in a separate output box, so you can review exactly what was taken out before using the optimized code.