Your files never leave your device. All processing happens in your browser.
Open the Img Stop Duplicate Photo Finder, open a folder or add many photos, and set the similarity slider. Exact and near-duplicate photos are grouped side by side with their size and resolution, the best (largest) copy is kept automatically, and you download only the unique photos as a ZIP or a CSV report.
About the Duplicate Photo Finder
The Img Stop Duplicate Photo Finder scans a folder or a pile of photos and finds both exact copies and near-duplicates – images that were resized, re-saved or slightly edited. It uses perceptual hashing, which compares what the pictures look like rather than just the file bytes.
Matching photos are shown in groups side by side with their file size and resolution, and the largest copy is selected to keep. Download only the unique photos as a ZIP, save a CSV report, or – in Chrome or Edge folder mode – delete the selected duplicates from the folder after you confirm. Nothing is uploaded.
Key features
- Exact and near-duplicatesFinds copies that were resized, re-saved or slightly edited.
- Perceptual hashingCompares how photos look, not just file names or bytes.
- Similarity sliderMake matching stricter or looser.
- Side-by-side groupsEach group shows file size and resolution.
- Keeps the best copyThe largest version is selected automatically.
- ZIP, CSV or deleteDownload unique photos, save a report, or delete duplicates in Chrome/Edge folder mode.
How to use the Duplicate Photo Finder
- Open photos Open a folder or add many photos at once.
- Set similarity Use the slider to choose how close a match must be.
- Review groups Check each group; the largest copy is kept by default.
- Export or clean up Download unique photos as ZIP, save a CSV, or delete selected duplicates from the folder.
Duplicate Photo Finder at a glance
| Price | Free, no watermark |
|---|---|
| Finds | Exact and near-duplicate photos |
| Method | Perceptual hashing with similarity slider |
| Keeps | Best (largest) copy automatically |
| Output | Unique photos as ZIP, CSV report, or delete (Chrome/Edge folder mode) |
| Processing | In your browser – photos are not uploaded |
When to use it
- Clean up a phone backup full of repeated WhatsApp images.
- Find resized or re-saved copies in a photo library.
- Pick the highest-resolution version before printing or archiving.
- Remove duplicate product images before uploading to a store.
- Make a CSV list of duplicates to review later.
Tips for the best result
- Start with a higher similarity setting, then lower it to catch more edited copies.
- Always look through the groups – similar burst shots may be grouped too.
- Use Chrome or Edge on a computer for folder mode and direct deleting.
- Keep a backup before deleting files from a folder.
Frequently asked questions
How do I find duplicate photos?
Open a folder or add your photos to the Img Stop Duplicate Photo Finder. It groups exact and similar copies so you can keep the best and download only unique photos.
Can it find photos that are similar but not identical?
Yes. Perceptual hashing finds images that were resized, re-saved or slightly edited. Move the similarity slider to control how close they must be.
Which copy is kept?
The largest (highest-quality) copy in each group is kept automatically, and you can change the selection before exporting.
Can it delete duplicates for me?
In Chrome or Edge folder mode it can delete the selected duplicates from the folder after you confirm. In other browsers, download the unique photos as a ZIP instead.
Are my photos uploaded?
No. The scan runs in your browser, so even large private libraries stay on your device.
Learn more
- MDN: Image file types – common image formats explained
Made and maintained by the Img Stop team.