What this tool does
Find exact duplicate image files using byte size and SHA-256 checksums. Files remain on your device.
How to use
Select 2–50 image files. Process to see groups sharing byte size and SHA-256, then download the report. The tool never deletes files.
Limitations
25 MB per file and 100 MB combined. Supported image filename extensions only; this tool hashes bytes without decoding. Different names can match. Visually identical re-encoded images or files with different metadata do not match. Similarity, face recognition and duplicate deletion are not included. SHA-256 collisions are theoretically possible.
FAQ
Are files or text uploaded?
No. Processing happens locally in your browser.
Should I review the output?
Yes. Compare it with the original using the stated limitations before use.
Does it work on mobile?
Modern browsers are supported; format support and available memory depend on your device.