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DataToolings

Free Online SHA-3 Hash Generator

Generate SHA-3 (Keccak) hashes online. Supports SHA3-224, SHA3-256, SHA3-384, SHA3-512, and Keccak variants. Free, instant, browser-based hash generator.

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What is SHA-3 Hash Generator?

SHA-3 Hash Generator is a free online tool that computes SHA-3 (Keccak) cryptographic hashes. SHA-3 is the latest member of the Secure Hash Algorithm family, standardized by NIST in 2015. It supports SHA3-224, SHA3-256, SHA3-384, SHA3-512, and the original Keccak variants used in Ethereum.

How to Generate a SHA-3 Hash

  1. Enter or paste your text into the input area
  2. Select the SHA-3 algorithm variant (SHA3-256 is recommended for most uses)
  3. Click "Generate Hash" to compute the hash
  4. Copy the result with the copy button

Features

  • 8 algorithm variants: SHA3-224/256/384/512 and Keccak-224/256/384/512
  • Keccak-256 is the variant used by Ethereum for address generation
  • 100% browser-based using the js-sha3 library
  • One-click copy of the hex output

FAQ

What is the difference between SHA-3 and Keccak?

Keccak is the algorithm that won the SHA-3 competition. NIST made minor padding changes before standardizing it as SHA-3. The Keccak variants here use the original padding, which is what Ethereum uses. SHA-3 variants use the NIST-standardized padding.

Which variant should I use for Ethereum?

Use Keccak-256 for Ethereum-compatible hashing. This is the variant used for Ethereum address generation and smart contract function selectors.

Is SHA-3 more secure than SHA-256?

SHA-3 and SHA-256 offer comparable security levels for their respective output sizes. SHA-3 uses a completely different internal structure (sponge construction) compared to SHA-2, making it a good alternative if SHA-2 were ever compromised.