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How to create a signed JWT online
Build an HS256/HS384/HS512 JWT from a JSON payload and secret in your browser.
Encode vs decode
JWT Decoder inspects an existing token. JWT Encoder builds a new one: header, JSON payload, and an HMAC signature using your secret. The secret stays on your device.
Steps
1) Open JWT Encoder. 2) Choose HS256 (typical). 3) Enter the signing secret. 4) Paste payload JSON. 5) Click Run and copy the token. Do not use production secrets on a shared computer.