Browser-based image workflow
Duplicate Image Finder
Find exact-byte matches and approximate visual similarities.
Settings
Choose images to begin.
Privacy: This published tool does not upload your selected files. Photos remain within this browser session unless you explicitly download an export. Large images may use significant device memory.
How to use Duplicate Image Finder
- Select supported source images from your device.
- Adjust the options and, for drawing tools, place annotations directly on the canvas.
- Select Process locally, inspect the output or its manifest, and download your results.
What this tool does
Hash selected local files with SHA-256 and compare downscaled perceptual difference hashes. Hash selected local files with SHA-256 and compare downscaled perceptual difference hashes.
Limitations
Hash similarity may have false positives or false negatives. Never deletes files automatically.
Decoded images are limited to 30 megapixels and 16,384 pixels per side; larger raster workflows can exceed browser memory even below these limits. Files must be 20 MB or smaller each and selection must be at most 120 MB. Animated inputs are rendered as a still frame; browser decoder capabilities differ. No paid APIs or server-side image upload endpoints are used.
Discover other image workflows or review our processing privacy notes.