SHA-3 and Keccak generator
Generate SHA3-224, SHA3-256, SHA3-384, SHA3-512 and Keccak-256 (Ethereum) hashes of a text or file.
How to useGenerate SHA-3.
Available in: 
SHA-3 and Keccak generator: what it is for
Generate the SHA-3 standard (FIPS 202) hashes in 224, 256, 384 and 512 bits and the Keccak-256 and Keccak-512 variants used by Ethereum and smart contracts. Works with text or files, in hex, uppercase or Base64.
Everything is calculated in your browser: the text and files never leave your computer.
How to use
- Type the text or choose a file.
- Compare SHA-3 and Keccak.
- Copy the hash.
When to use it
- Compute Ethereum hashes and selectors.
- Use an alternative to the SHA-2 family.
- Test SHA-3 implementations.
Frequently asked questions
What is the difference between SHA-3 and Keccak-256?
Keccak won the competition that chose SHA-3, but the final standard changed a padding detail. That is why the Keccak-256 used by Ethereum gives a different result from the official SHA3-256.
Is SHA-3 better than SHA-256?
Both are secure. SHA-3 uses a different construction (sponge), so it is a backup in case a flaw ever appears in the SHA-2 family.
Does the text leave my device?
No. The hash is calculated in your browser; nothing is sent to a server.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.