SHA-3 Hash Generator
Compute SHA-3 Keccak cryptographic hash representations for text strings.
About SHA-3 Hash Generator
The SHA-3 (Keccak) Hash Generator computes next-generation 224, 256, 384, and 512-bit cryptographic sponge-construction hashes for text, Ethereum smart contract addresses, and blockchain data structures.
How to Use SHA-3 Hash Generator
Step 1
Type or paste text into the input field.
Step 2
Select algorithm variant (SHA3-256 or Keccak-256).
Step 3
View the computed cryptographic hash in real time.
Step 4
Click "Copy Hash".
Practical Use Cases for SHA-3 Hash Generator
Ethereum & Web3 Smart Contract Development
Compute Keccak-256 / SHA-3 function selectors and Ethereum wallet address hashes for Solidity smart contracts.
FIPS 202 Cryptographic Standard Implementation
Implement modern sponge-construction cryptographic hashes impervious to SHA-2 length-extension vulnerabilities.
Input & Output Examples
Generating Keccak-256 for Ethereum Function Selector
Text: transfer(address,uint256)
Keccak-256: a9059cbb2ab09eb219583f4a59a5d0623ade346d962ad4e2d6b61f41797490d9
Key Features & Performance
- ✓Supports SHA3-224, SHA3-256, SHA3-384, SHA3-512, and Keccak-256 variants.
- ✓Dedicated Ethereum Keccak-256 mode with 4-byte function signature prefix.
- ✓100% Client-Side memory execution.
- ✓1-Click Copy SHA-3 digest.
Key Terminology & Definitions
Keccak Sponge Construction
A novel cryptographic hashing architecture designed by Guido Bertoni, Joan Daemen, Michaël Peeters, and Gilles Van Assche that won the NIST hash competition in 2012.
Length Extension Attack
A vulnerability in Merkle–Damgård hashes (MD5, SHA-1, SHA-2) where an attacker can reconstruct hashes of extended messages, which SHA-3 completely eliminates.