Group look-alike pictures, including resized, recompressed and lightly edited copies
Processed in your browser. Nothing is uploaded. Updated on 24 Oct 2026.Two files can hold the same picture without a single byte in common: one saved as PNG, one resized for email, one brightened a little. This page compares what the pictures look like, using a 128-bit fingerprint of each one, and opens with a looser setting that also catches light edits. Move the slider towards Strict if different shots of one scene start landing together. Every group shows how many of the 128 bits differ.
Drop the pictures or press Choose photos; How alike counts as a copy opens at 16 of 128 bits, which also groups light edits.
Move the slider towards Strict if different shots of one scene land in the same group.
Read under each picture how many of the 128 bits differ from the one suggested to keep.
Tap pictures to mark Keep or Remove, then press Download photos without duplicates (ZIP).
A photo library collects copies without anyone meaning to: the same picture from a phone backup and from WhatsApp, a camera card copied twice, an album exported at a smaller size. This page finds them and tells you which copy is worth keeping.
Two kinds of duplicate. Files with exactly the same bytes are found by their SHA-256 fingerprint, which never mistakes two different files for one. Copies that were resized, recompressed or saved in another format share no bytes, so each picture is also shrunk to a small grey grid and turned into a 128-bit difference hash. Two photos count as similar when only a few of those 128 bits differ; a halved copy of a photo usually differs in 0 to 4.
The slider. Strict matches only resized and recompressed copies. Normal, the default, also catches light edits. Loose may group different shots of the same scene, so check those groups before acting on them. Photos of a different shape (a square crop of a wide photo) are never grouped.
The rest of the article, and all 6 questions about Duplicate Image Finder, are on the Duplicate Image Finder page.
Press Choose a folder, or drop the folder or the photos on the page. Every photo is read on your device, subfolders included, and the duplicates appear in groups with thumbnails and the best copy marked Keep. Up to 2,000 photos are read in one go.
Yes. Besides identical files, each picture gets a 128-bit difference hash from a small grey version of itself. A copy saved at half the size or a lower JPEG quality usually differs in 0 to 4 of those bits, well inside the default limit of 12.
No. Nothing is deleted, moved or renamed. Download the CSV list to see which files to remove, or download a ZIP of the set without the duplicates and use that instead of the old folder. Deleting the originals is left to you.
At the Loose end of the slider, shots of the same scene taken a moment apart can look alike to the hash. Move the slider towards Strict and the groups rebuild at once. Each photo shows how many of its 128 bits differ from the one kept.
Still stuck? Ask about Duplicate Image Finder and anybody who knows can answer. No account needed.
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On the related tools: HEIC to PNG – Convert iPhone HEIC photos to lossless PNG.