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File Hash Calculator (MD5 / SHA-1 / SHA-256)

Drop a file into your browser to instantly compute MD5, SHA-1, and SHA-256. Perfect for detecting tampering and verifying integrity of downloaded files.

✅ 100% free, no signup, runs entirely in your browser

If something is broken or not displaying correctly, let us know via the contact form — we use the feedback to improve.

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📖 How to Use

  1. 1
    Drag & drop a file
    Drop the file you want to verify. Up to ~2 GB.
  2. 2
    Hash is auto-computed
    MD5 / SHA-1 / SHA-256 are computed in parallel, streaming for large files.
  3. 3
    Compare with expected hash
    Paste the expected hash from the vendor site and see match/mismatch highlighted.

❓ FAQ

Does it support SHA-3 / BLAKE2?
Currently supports browser-native Web Crypto (MD5, SHA-1, SHA-256/384/512). SHA-3 and BLAKE2 need extra JS libraries — planned.
Is my file uploaded to the server?
No. Files are read via FileReader and hashed with Web Crypto in your browser — no upload happens. Safe for confidential files.
How do I verify a downloaded file is untampered?
Compare our computed hash against the expected value from the vendor (usually in a .sha256 file or README). If they match, the file is untampered.
Is MD5 still safe to use?
MD5 has known collision attacks — not for security. Fine for download integrity but prefer SHA-256+ for new designs.