SHA3-256 & SHA3-512 (Keccak) Hash Generator
Generate cryptographic FIPS 202 SHA-3 and Keccak hashes locally in your browser.
Execution runs 100% locally inside the browser sandbox using HTML5 Canvas, Web Cryptography Subtle API, and Web Workers. No data is ever transmitted across the network.
Zero network latency. Operates completely offline with zero dependencies on third-party backend servers or cloud services.
Built according to official RFC specifications, cryptographic test vectors, and enterprise-grade data transformation standards.
How to Use SHA3-256 & SHA3-512 (Keccak) Hash Generator
Select SHA3-256 or SHA3-512.
Type or paste the input string to hash.
Click to copy the calculated hexadecimal SHA-3 digest.
Frequently Asked Questions
What is the difference between SHA-2 and SHA-3?
SHA-3 uses the sponge construction based on Keccak permutation, providing distinct mathematical security from SHA-2's Merkle-Damgård structure.
Is this NIST compliant?
Yes, it conforms to the official NIST FIPS 202 SHA-3 specification with 0x06 domain padding.
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