Enter JWT Token
Header (Decoded)
// Header will appear herePayload (Decoded)
// Payload will appear here100% Private Offline JWT Encoder & Decoder
JSON Web Tokens (JWT) are standard objects used to securely represent claims between two parties in modern API systems. Our tool lets you both encode and decode JWTs entirely in your browser — your sensitive data never leaves your machine.
Use the Decoder to instantly inspect the header and payload of any existing JWT. Use the Encoder to quickly craft JWT tokens from custom header and payload JSON for development, testing, and debugging. Everything is executed locally on your device with zero data transmitted to external servers.