Is there a free duplicate file finder without hidden ads?

Hi everyone, I'm on the hunt for a free duplicate file finder that truly lives up to its promise—no hidden ads, popups, or bloatware. I've tried a few tools recently, but many either come with bundled software or start showing ads after a scan. I'm looking for something lightweight, efficient, and clean that helps me identify and remove duplicate files without slowing down my system or bombarding me with unwanted content.