Online Keccak-512 Hash Generator
The strongest original Keccak with 512-bit output. Paste your text and click the button to compute its Keccak-512 hash — everything runs on your device and is never sent to a server.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
hello world
Example Output
3ee2b40047b8060f68c67242175660f4174d0af5c01d47168ec20ed619b0b7c42181f40aa1046f39e2ef9efc6910782a998e0013d172458957957fac9405b67d
How to Use
- 1Type or paste the text you want to hash into the Input field.
- 2Click the Generate Hash button (or press Ctrl+Enter) to compute the Keccak-512 hash.
- 3The Keccak-512 hash appears in the Output field. Click Copy to copy it to your clipboard.
- 4Click Clear to empty the fields and start over.
About Keccak-512
Keccak-512 is a hash function from the Keccak family — the algorithm that won the NIST hash competition and was later standardized as SHA-3. Keccak-512 produces a 512-bit hash value.
Important: the "original" Keccak differs from official SHA-3 only in the padding byte (domain separation). As a result, Keccak and SHA-3 hashes of the same input are NOT identical. Both use the same sponge construction and Keccak-f permutation.
Keccak-512 (especially Keccak-256) is widely used in the Ethereum blockchain ecosystem for addresses, signatures, and internal hashing — predating the finalized SHA-3. If you work with Ethereum/Solidity, use Keccak, not SHA-3.
FAQ
What is the difference between Keccak-256 and SHA3-256?
Both use the same core algorithm, but their padding byte differs, so their hashes differ for the same input. Ethereum uses Keccak-256 (the original version), not SHA3-256.
How long is a Keccak-512 hash?
A Keccak-512 hash is 512-bit long (128 karakter heksadesimal / 128 hexadecimal characters).
Is my data sent to a server?
No. The Keccak-512 hash is computed entirely in your browser. The text you enter never leaves your device.