SHA-3 Hash Generator - Keccak Checksums Online

Generate SHA3-256, SHA3-512, SHA3-384, SHA3-224 hashes from text or files. Modern Keccak-based cryptographic checksums. Browser-based, private.

Input Text

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Hash Output

Hash Info

Algorithm: SHA3-256

Output: 256 bits (64 hex chars)

Security: 128-bit collision resistance

Algorithm Comparison

Algorithm	Bits	Hex Chars	Use Case
SHA3-224	224	56	Legacy compatibility
SHA3-256	256	64	General purpose
SHA3-384	384	96	TLS certificates
SHA3-512	512	128	Maximum security
Keccak-256	256	64	Ethereum/crypto

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Frequently Asked Questions

SHA-3 (Secure Hash Algorithm 3) is the latest member of the SHA family, standardized by NIST in 2015. It's based on the Keccak algorithm and provides an alternative to SHA-2 with a completely different internal structure.

SHA-3 uses a sponge construction (Keccak) while SHA-2 uses Merkle-Damgård. They're designed differently, so a breakthrough against one wouldn't affect the other. Both are currently secure.

SHA3-256 is the most common choice, offering 128-bit security against collision attacks. Use SHA3-512 for maximum security or when matching SHA-512 output length requirements.

SHAKE (Secure Hash Algorithm with Keccak) are extendable-output functions (XOF) from the SHA-3 family. Unlike fixed-output SHA3, SHAKE can produce any output length you specify.

Both are considered secure. SHA-3 isn't 'more secure' but provides cryptographic diversity. If SHA-2 were broken, SHA-3 would be unaffected due to its different design.

SHA3-224: 224 bits (56 hex), SHA3-256: 256 bits (64 hex), SHA3-384: 384 bits (96 hex), SHA3-512: 512 bits (128 hex). SHAKE can output any length.

Cryptocurrency (Ethereum uses Keccak-256), digital signatures, key derivation, random number generation, and as a backup to SHA-2 in high-security applications.

Keccak won the NIST hash competition and became SHA-3. NIST made minor changes to the padding scheme. Ethereum uses original Keccak-256, not NIST SHA3-256.

Yes. All hashing uses JavaScript in your browser. Your text and files never leave your device. The js-sha3 library performs the computation entirely client-side.

No. Like all secure hash functions, SHA-3 is a one-way function. You cannot recover the original input from the hash output.

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