JWT Decoder & Inspector

Decode, parse and inspect JSON Web Tokens in real time. 100% Client-Side for maximum privacy.

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100% Client-Side Privacy: Tokens are decoded directly in your browser. No sensitive authorization keys or bearer tokens are ever transmitted to any backend server.
1. Header (Algorithm & Token Type)
// Header will appear here
2. Payload (Claims & Data)
// Payload data will appear here
3. Signature

Base64URL-encoded HMAC or RSA/ECDSA digital cryptographic signature:

// Signature will appear here

Understanding JSON Web Tokens (JWT)

What is a JSON Web Token?

JWT (RFC 7519) is an open industry standard for securely transmitting claims between parties as a compact JSON object.

Can JWT payload contain passwords or sensitive data?

No. Standard JWT tokens are signed, not encrypted. Anyone can decode Base64URL and read claims. Never store plain passwords.