SHAKE-256 Hash Generator

SHAKE-256 Hash Generator - Generate Extendable-Output Hashes

Generate SHAKE-256 cryptographic hash values with our free online SHAKE-256 generator. SHAKE-256 is a member of the SHA-3 (Keccak) family of cryptographic hash functions, specifically part of the Extendable-Output Functions (XOF) category. Unlike traditional fixed-length hash functions, SHAKE-256 allows you to generate output of any desired length while maintaining cryptographic security. It is standardized by NIST in FIPS 202.

What is SHAKE-256?

SHAKE-256 is a Secure Hash Algorithm (SHA-3) based on the Keccak sponge construction. As an Extendable-Output Function (XOF), it can produce hash values of any specified length — not just fixed sizes like traditional hashes (SHA-256, SHA-512). SHAKE-256 offers a security level of 256 bits against preimage attacks and 128 bits against collision attacks for output lengths of 512 bits or more. It is widely used in modern cryptographic applications including digital signatures, key derivation, and blockchain technologies.

Frequently Asked Questions

What is the difference between SHAKE-256 and SHA-256?

SHA-256 produces a fixed 256-bit (32-byte) output, while SHAKE-256 is an XOF that can produce output of any length. SHAKE-256 is based on the newer SHA-3 (Keccak) standard, while SHA-256 is part of the older SHA-2 family. SHAKE-256 offers equivalent security to SHA-256 but with flexible output length.

What does "extendable-output" mean?

Extendable-output means the hash function can produce output of any desired length. You simply specify the number of output bits you need — 128, 256, 512, 1024, or any other value — and the function generates exactly that much output while maintaining security guarantees.

How secure is SHAKE-256?

SHAKE-256 provides 256 bits of security against preimage attacks (finding an input that produces a given hash) and 128 bits of security against collision attacks (finding two inputs with the same hash), matching the security of SHA-256.

What input formats are supported?

You can input text strings, hexadecimal values, or upload files. The tool processes your input and generates the SHAKE-256 hash in your chosen output length and format (hexadecimal or base64).

Is my data processed on your servers?

No. All hash generation is performed locally in your browser using JavaScript. Your data never leaves your device, ensuring complete privacy and security.

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Shake 256 Hash Generator