SHA3-256 Hash Generator

SHA3-256 is the 256-bit member of the SHA-3 cryptographic hash family standardized by NIST in FIPS 202. It creates a fixed-length digest that this tool displays as 64 uppercase hexadecimal characters.

This tool hashes the text entered in the input box in the browser and writes the SHA3-256 digest to the output box without sending the text to a server. Because SHA3-256 is deterministic, the same exact input text produces the same output every time.

Use this page when you need a quick SHA3-256 digest for sample text, test vectors, log comparisons, checksum-style identifiers, or compatibility checks with systems that explicitly require SHA3-256. SHA3-256 is not the same as raw Keccak-256; they are related but intentionally produce different values for the same input.

The generated value depends on the exact bytes being hashed. Spaces, tabs, punctuation, capitalization, line endings, trailing newlines, and Unicode characters all change the result. The tool hashes text only; it does not read files, decode hexadecimal input as binary data, add salts, create HMACs, manage keys, or provide password storage. For authentication, signatures, password hashing, or protocol integration, use the algorithm, encoding, and reviewed cryptographic library required by that system.