Tools/SecurityHMAC GeneratorCreate or verify HMAC signatures with SHA-256, SHA-384, or SHA-512 locally.Hash algorithmSHA-256SHA-384SHA-512SHA-256SecretMessageExpected signatureOptional. Paste a Base64 signature to verify.Base64 signatureCopy signatureGenerate / verifyHow this tool worksHow it worksEnter a shared secret and message. Optionally paste an expected Base64 signature to verify it.PrivacyKeys and messages remain in memory in your browser.