Keccak-256 Hash Generator

Generate a Keccak-256 hash of a string of text.

Question

What is Keccak-256?

Keccak-256 is a 256-bit cryptographic hash function from the Keccak family. This page hashes the entered text as UTF-8 and returns a deterministic 64-character lowercase hexadecimal digest.

Use Keccak-256 when a protocol, test vector, compatibility check, or legacy system explicitly asks for raw Keccak output. It is not interchangeable with SHA3-256: both use the Keccak family and produce 256-bit digests, but standardized SHA3-256 intentionally produces different values for the same input.

The hash depends on the exact text you enter, including whitespace, capitalization, punctuation, line endings, and Unicode characters. A hash is one-way and cannot be decoded back to the original text. Do not treat an unkeyed hash as authentication by itself, and use a dedicated password hashing scheme with salts and work factors for password storage.

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