Duplicate & Similar Image Finder
Secure & Fast Duplicate Image Finder
A completely local, secure duplicate image finder. Process thousands of photos directly in your browser without uploading anything. Supports HEIC, multiple comparison algorithms, and easy ZIP exports.
How to Use
Drag and drop your image files or an entire folder into the drop zone.
Adjust the comparison algorithm and threshold to fine-tune how strict the matching should be.
Click the find button to process your images instantly within your browser.
Use the smart auto-select buttons or visually compare images in the zoom modal to pick which ones to keep or remove.
Export your selected duplicates or the remaining clean images as a ZIP file.
Why It's Awesome
Secure Local Processing:
Your photos never leave your device. The entire analysis runs securely inside your browser, ensuring complete privacy.
Advanced Comparison Algorithms:
Go beyond exact matches. With Average Hash (aHash), Difference Hash (dHash), and Perceptual Hash (pHash), you can find resized, cropped, or slightly edited duplicates.
HEIC & Folder Support:
Easily drag and drop entire folders. iPhone HEIC/HEIF photos are automatically converted and processed on the fly.
Synchronized Zoom Modal:
When comparing very similar photos, the preview modal perfectly synchronizes your mouse scroll and panning across all images, making it easy to spot minute differences.
Frequently Asked Questions
Are my photos uploaded to a server?
No, absolutely not. All processing is done locally in your browser using Web Workers. Your photos remain completely private.
What is the difference between aHash, dHash, and pHash?
aHash is fast and simple, dHash is excellent for finding resized or slightly modified images, and pHash is the most accurate for finding visual similarities even with color changes or strong compressions.
Can I delete the duplicates directly from my computer?
Browsers cannot directly delete files from your hard drive for security reasons. Instead, you can download a ZIP of the clean 'remaining' images, or download the selected 'duplicate' images.