Find duplicate images in your collection
Click to select multiple images
Duplicate Image Finder scans a batch of images you select and flags pairs that are byte-for-byte identical, entirely in your browser — nothing is uploaded to a server. It works by comparing each image's full encoded data, so it only flags true exact duplicates and does not detect visually similar images with different resolutions or edits.
Is Duplicate Image Finder really free to use?
Yes, it's completely free with no account required.
How many images can I upload at once?
There's no fixed limit — you can select as many as your browser can comfortably load at once, though very large batches will take longer.
Will my images be stored on your servers?
No, images are read and compared entirely in your browser using the File API. They are never uploaded anywhere.
Can it find similar images, or just exact duplicates?
It only flags images whose full encoded data matches exactly, so it's reliable for catching true duplicate files without false positives. It does not use visual similarity matching, so resized, cropped, or edited copies of the same photo generally won't be flagged.