Standard & Custom Claims
HMAC-SHA256 Signing Secret
Never share your production secrets. Secret hashing runs 100% in local browser memory.
Signed JWT Output
Header (Algorithm)
Payload (Claims)
Signature (HMAC)
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How to build and sign JWTs
- 1Edit JSON payload claims (sub, exp, roles).
- 2Provide a signing secret key.
- 3Copy the generated three-part JWT token for API testing.
Web Crypto API Security
Executed via native crypto.subtle without server communication.
Frequently Asked Questions
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