HMAC Generator

VerifiedLocal processinghigh sensitivity

HMAC Generator

Create keyed hash message authentication code

Workbench

Use HMAC Generator

Inputs are not saved by the workspace.

Message

Secret Key

Algorithm:

HMAC Output

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Known limitations

Message and secret are interpreted as UTF-8 text, not hexadecimal or Base64 key material.
SHA-1 is intentionally unavailable.
Text input is measured after UTF-8 encoding.
Processing runs in the current browser tab.

Standards and references

RFC 4231 — HMAC Test Cases

Understand the result

SHA-256 versus HMAC: integrity, authentication and common mistakes

SHA-256 Hash Generator SHA-512 Hash Generator UUID/GUID Generator Bcrypt Generator

These links carry no input or output. Cross-tool payload handoff is kept in memory only when a compatible tool explicitly offers it.