Duplicate File Finder
Pick a folder and find real duplicates by hashing file contents (SHA-256), so renamed copies are still caught. Everything runs in your browser — no file ever leaves your device.
🔒 Runs entirely in your browser · nothing is uploaded or stored
🔒 Fully local
Files are read and hashed with the Web Crypto API inside your browser. Nothing is uploaded — close the tab and it's all gone.
🧹 Content-based
Matches by SHA-256 of file bytes, so photo.jpg and photo (1).jpg are detected as the same file even with different names.
Frequently Asked Questions
Are my files uploaded?
No. Every file is read and hashed locally using the browser's Web Crypto API. Nothing is sent anywhere — works offline too.
Why hash instead of comparing names?
Names lie. Content hashing (SHA-256) finds true duplicates even when copies were renamed, and avoids false matches between different files that happen to share a name.
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