Duplicate Image Finder
Compares visual content — regardless of filename or file size
All images are unique with the current settings.
How Does Duplicate Detection Work?
Instead of comparing filenames or file sizes, this tool generates a visual fingerprint (a perceptual hash) for every image based on its actual pixel content. That means it can catch duplicates even when they've been renamed, resized, re-saved in a different format, or slightly compressed.
What Does the Sensitivity Slider Do?
Lower the slider toward 85% to catch near-duplicates — similar photos, different crops, or slightly edited versions. Push it to 100% to flag only exact or near-pixel-identical matches. Adjust and click "Re-analyze" to instantly see the difference.
Is My Photo Library Uploaded Anywhere?
No. Every image is read and hashed directly in your browser using the Canvas API — nothing is sent to a server, which makes this safe to use on personal photo collections, screenshots, or work files.