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JWT Decoder
Decode and inspect JSON Web Tokens (JWT). View header, payload, and verify expiration.
What is JWT?
JSON Web Token (JWT) is a compact, URL-safe token format used for authentication and data exchange. A JWT has three parts: Header (algorithm), Payload (claims), and Signature (verification).
Security Note
This tool decodes the token locally in your browser. The JWT is never sent to any server. However, remember that JWTs are only encoded (Base64), not encrypted — anyone can read the payload.