Deduplicate Files with Hashing

Identify duplicate files by comparing their SHA-256 hashes — identical content produces identical hashes.

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Tip: SHA-256 and SHA-512 are cryptographically secure. SHA-1 is legacy and no longer recommended for security-sensitive use. All hashing runs locally in your browser — files and text are never sent anywhere.

Deduplication tips

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Two files with the same SHA-256 hash have identical content, regardless of filename or modification date. Use this to find exact duplicates.

📁

Hash each version of a document to see if two "different" files are actually the same. Useful for auditing shared drives with redundant copies.

💡

For large-scale deduplication across thousands of files, use a command-line tool that hashes in bulk. This tool is best for spot-checking.

🖼️

Note: perceptual similarity (visually similar images) requires specialised tools. SHA-256 only detects exact byte-for-byte duplicates.

Cara ia berfungsi

Masukkan

Enter your data into the tool above. Everything stays local to your browser.

Proses

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Muat turun

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

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✓Percuma sepenuhnya — tiada kos tersembunyi, selama-lamanya

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✓Tiada had saiz fail langsung

✓Tiada tera air pada sebarang output

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