Keccak256 Hash Generator
Compute Keccak-256 digests from text with uppercase or lowercase hex output in the browser.
Generate Keccak-256 hashes in the browser
Keccak-256 is widely used for Ethereum address derivation, event topic hashing, and other preimage checks. Enter any UTF-8 string and get a 256-bit Keccak digest in hex without leaving the page.
Need a different width? Try the Keccak224 Hash Generator, Keccak384, or Keccak512. For NIST SHA3-256 output, use the SHA3-256 Hash Generator.
Frequently Asked Questions
Why does my hash differ from SHA3-256?
SHA3-256 applies standardized padding. This tool uses original Keccak-256 padding, which matches common blockchain libraries.
Can I switch hex letter case?
Yes. Choose lowercase or uppercase hex before copying the digest.
Is hashing done locally?
Yes. Your message never leaves the browser.
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