JWT Decoder
JWT Encoder
Header
Payload
Secret Key
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728 x 90About JWT (JSON Web Tokens)
- JWT Structure: A JWT consists of three parts: Header, Payload, and Signature, separated by dots.
- Header: Typically contains the token type (JWT) and the signing algorithm (e.g., HS256, RS256).
- Payload: Contains the claims (statements about an entity and additional data).
- Signature: Used to verify that the sender of the JWT is who it says it is and to ensure the message wasn't changed along the way.
- Common Algorithms: HS256 (HMAC with SHA-256), RS256 (RSA Signature with SHA-256), ES256 (ECDSA with SHA-256).
- Security Note: This tool works entirely in your browser - your tokens and secrets never leave your computer.
- Important: Never put sensitive information in JWT payloads as they can be easily decoded.