Online JWT Encoder Decoder
Decode a JWT (base64url payload) and show header and payload. Optionally encode payload to JWT (client-side signing is limited).
Frequently Asked Questions
- What is shown when decoding?
- Header (alg, typ) and payload (claims) are base64url-decoded and shown as JSON. Signature is not verified.
- Can I sign a JWT here?
- Signing requires a secret and crypto. This tool focuses on decode; encode is limited (e.g. unsigned for debugging).
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