Find duplicate photos on Mac
Find duplicate and near-identical photos, and clear them out.
Phones make duplicates without asking: burst shots, the same photo saved twice, a copy that got resized or re-saved somewhere along the way. Over a few years a folder quietly fills with near-identical pictures eating gigabytes. Finding duplicates means spotting not just the exact copies but the ones that only look the same, grouping them, and letting you keep the best of each set and clear the rest — safely, with a chance to check first.
The free way (if there is one)
The Photos app flags exact duplicates in its Duplicates album for free and lets you merge them. It only works inside your Photos library, not a folder on disk, and it catches exact copies — not near-identical shots that were resized, re-saved or lightly edited.
The Photos app flags exact duplicates in its Duplicates album for free, and it's worth using for your library. It only looks inside Photos, and it only catches exact copies — not a folder on disk, and not the near-identical shots that were resized or re-saved. That's the gap Fileknife fills.
With Fileknife
Here's the same job in Fileknife, where it stays on your Mac:
- Choose a folder to scan, or drop photos onto Fileknife.
- It groups the duplicates into sets — see how many and how much space they take.
- In each set, pick which photo to keep (preview any of them first).
- Move the rest to the Trash, or save the unique set as copies.
Why reach for Fileknife
- Scans a folder on disk, not just the Photos library.
- Catches near-identical photos — re-saved, resized or lightly edited — not only exact copies.
- You review each set and choose which to keep, with a preview of every photo.
- Move the duplicates to the Trash (recoverable) or save just the unique set — your call, on your Mac.
Presets and options
- Looks the same
- Exact copies only
Takes: A folder of photos, or dropped photos (HEIC, JPG, PNG, TIFF). Gives: Duplicates moved to the Trash, or a copied set of the unique photos.
Honest limits
Near-identical matching is a judgement call, so you review every set before anything moves — nothing is removed automatically. "Move to Trash" is recoverable: the duplicates go to your Mac's Trash, not a permanent delete.
FAQ
Does it delete my photos automatically?
No. You review each set and choose what to keep. Removing duplicates moves them to the Trash, so you can restore them if you change your mind — nothing is permanently deleted.
Can't the Photos app already find duplicates?
It finds exact duplicates inside your Photos library. Fileknife scans a folder on disk and also catches near-identical shots — resized or re-saved copies — that Photos misses.
What counts as a near-identical photo?
The same picture that was re-saved, resized or lightly edited, so the files differ but the image is the same. You can switch to exact-copies-only if you'd rather match byte-for-byte.
Is anything uploaded?
No. The whole scan runs on your Mac.
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