| Tool | Time to find 10k duplicates | | ------------------ | --------------------------- | | CCleaner (duplicate finder) | 14 minutes | | Duplicate Cleaner Pro | 8 minutes | | | 42 seconds |
: Locates exact duplicates based on file hashes. windows-czkawka-gui.zip
: For "Similar Images," use the "Very High" or "High" similarity setting first to avoid accidentally deleting photos that are only vaguely related. | Tool | Time to find 10k duplicates
: Detects visually similar photos even if they have different resolutions or formats. windows-czkawka-gui.zip
Because it is a .zip file, you can run it from a USB stick or a "PortableApps" folder. It never phones home. Some cleaners require cloud uploads for "similar image analysis"—Czkawka does everything locally.
Similar images — reduce near-duplicates