Hash a downloaded software package
file = (select any file)
Result: Select a file to see its SHA-3-256 hash.
File SHA-3 Hash Generator
Compute the SHA-3-256 hash (digest) of a file without uploading it. SHA-3 uses the Keccak algorithm, which won the NIST hash competition in 2012. It provides strong collision resistance and is used as an alternative to SHA-2 in security-critical applications.
Privacy: this tool processes your data entirely in your browser. Nothing you paste or type is sent to the server.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
How is SHA-3 different from SHA-256?
SHA-3 is based on the Keccak sponge construction, while SHA-256 uses the Merkle–Damgård construction. Both produce 256-bit digests, but SHA-3 is structurally different, providing a fallback if SHA-2 vulnerabilities are discovered.
Is my file uploaded?
No. The file is read entirely in your browser and hashed locally. Nothing is transmitted.
Is this a production-grade SHA-3 implementation?
This is an educational implementation. For production use, rely on your platform's native crypto libraries (e.g., OpenSSL, libsodium).
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