PRIVATE BROWSER UTILITY

Duplicate File Checker

Find byte-identical duplicate files using SHA-256, without deleting anything.

Choose multiple files. Files of equal size are hashed locally with the browser's Web Crypto API and grouped when their hashes match.

🔒 Local processing only. We do not upload your selected files.

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Before you begin: This detects exact duplicate bytes, not visually similar photos. Files larger than 256 MiB are skipped for browser memory safety.

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