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How to Use Find Duplicates: Complete Guide (2026)
Learn how to use find duplicates free online — no signup, no download. Follow our step-by-step guide below.
What is Find Duplicates?
Detect duplicate or near-duplicate images using perceptual hashing (pHash). Finds images that are visually similar even if they have different file names, formats, or slight color/size variations. Essential for cleaning up photo libraries and removing redundant assets.
- 100% browser-based — no data uploaded to servers
- Free to use — no signup required
- Instant results — no waiting
- Works on all devices — mobile, tablet, desktop
How to Use Find Duplicates: Step-by-Step
- 1
Upload images to compare
Drag and drop 2 or more images. Or upload an entire folder of images for batch comparison.
- 2
Set similarity threshold
Adjust the threshold (0-100%). Higher = only exact duplicates. Lower = includes visually similar images.
- 3
Scan for duplicates
Click Scan. The tool computes perceptual hashes and compares them.
- 4
Review results
Duplicate/near-duplicate pairs are displayed with similarity score. Choose which to delete.
Common Use Cases
Photo library cleanup
Find and remove duplicate photos from your collection (same photo saved multiple times, edited vs. original, etc.).
Asset deduplication
Clean up design asset folders by finding visually identical images with different names or formats.
Copyright enforcement
Find unauthorized copies of your images that have been slightly modified (cropped, recompressed, color-adjusted).
FAQ About Find Duplicates
What is perceptual hashing?
Unlike cryptographic hashing (MD5, SHA), perceptual hashing generates similar hashes for visually similar images. Two images that are 90% similar will have similar pHash values.
Can it detect cropped or resized duplicates?
Yes. Perceptual hash is resilient to resizing and minor cropping. But heavily cropped images may not match.
What similarity threshold should I use?
90%+ = near-exact duplicates. 70-90% = visually very similar (likely duplicates with minor edits). Below 70% = similar but possibly different images.
Ready to Try Find Duplicates?
No signup. No download. 100% free.