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Generate SHA-3 hash values (SHA3-224, SHA3-256, SHA3-384, SHA3-512) from text input with Keccak algorithm.
Generate SHA-3 (Keccak) digests at 224, 256, 384, or 512 bits, computed locally.
SHA-3 is the newest member of the Secure Hash Algorithm family, standardized by NIST in 2015. It is built on the Keccak sponge construction, which is structurally different from SHA-2, providing a strong alternative should weaknesses ever be found in earlier designs. Choose a larger output size for a wider security margin. All hashing happens locally in your browser.
SHA-3 is the newest member of the Secure Hash Algorithm family, standardized by NIST in 2015. It is built on the Keccak sponge construction, which is structurally different from the earlier SHA-1 and SHA-2 designs. This tool computes every standard variant — SHA3-224, SHA3-256, SHA3-384, and SHA3-512 — from any text you enter, where the number refers to the output size in bits.
Like all cryptographic hashes, SHA-3 is deterministic and one-way. The same input always yields the same digest, a tiny change to the input completely changes the output, and there is no practical way to reverse a digest back into the original text. Because Keccak's internal structure is unrelated to SHA-2, SHA-3 also serves as a strong backup standard: it provides a different design to fall back on should weaknesses ever be discovered in earlier algorithms.
Everything is calculated locally in your browser, so the values you hash never leave your device. Use SHA3-256 for general-purpose integrity checks; choose SHA3-384 or SHA3-512 when you want a larger security margin or need to match a system that expects those sizes. As with any raw hash, SHA-3 is not a substitute for a salted password hash — for storing passwords, use bcrypt, scrypt, or Argon2.
SHA-3 uses the Keccak sponge construction, which is structurally unrelated to the Merkle-Damgard design behind SHA-1 and SHA-2. Both are secure, but their different internals mean a weakness in one family would not automatically affect the other.
Yes. SHA-3 has no known practical collision or preimage attacks and is a current NIST standard. It is a solid choice wherever a modern cryptographic hash is required.
SHA3-256 is a good default for general integrity checks. Choose SHA3-384 or SHA3-512 when you want a larger security margin or must match a system that expects those output sizes.
Not on its own. Plain SHA-3 is fast, which helps attackers guess passwords quickly. Use a slow, salted password hash such as bcrypt, scrypt, or Argon2 for credential storage.
No. All hashing happens in your browser, so your text is never transmitted or stored on a server.