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Duplicate Image Finder
Find identical image files before you upload, archive, or share a batch.
Everything runs locally in your browser. Nothing is sent to the server.
Choose the images you want to compare.
Up to 100 images · 25 MB per file
Duplicate check
Choose images to begin
Exact duplicate groups will appear here.
SHA-256 is calculated in your browser. Files are never uploaded.
What it does
Compare a batch of image files by their exact contents and find copies before you upload or organize them. Each match is grouped with its filename and size.
How to use it
- Choose the image files you want to check.
- Review groups that contain identical files.
- Copy the duplicate list or remove extra copies on your device.
Tips
- Only exact byte-for-byte matches are grouped; resized or edited images remain separate.
- Up to 100 images can be checked at once.
- Files stay on your device while they are compared.
FAQ
Are my images uploaded?
No. Your browser creates a SHA-256 fingerprint locally and does not send the files anywhere.
Will resized images be found?
No. This first version finds exact copies only, not visually similar images.