HKDF Key Derivation

Derive one or more output keys from an input keying material (IKM) using HKDF (HMAC-based Extract-and-Expand Key Derivation Function, RFC 5869). HKDF first extracts a fixed-size pseudorandom key (PRK) from the IKM and an optional salt, then expands it to any length using an optional info/context string. HMAC-SHA-256 / SHA-384 / SHA-512 via the Web Crypto API; everything runs locally in your browser.

Inputs

Input keying material (IKM) — text or hex

IKM format

Salt (optional)

Salt format

Info / context (optional)

Info format

HMAC hash

Output length (bytes)

Output display:

Result

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Enter inputs and press Derive.