About JWT Decoding
JSON Web Tokens (JWTs) are essential in modern AI artificial Intelligence and Data Science applications for secure authentication and authorization. Our JWT decoder helps you inspect token contents, verify claims, and debug authentication issues.
Whether you're building microservices, implementing OAuth flows, or debugging API authentication, understanding JWT structure is crucial. Combine with our base64 encoding and json to csv tools for complete token analysis workflows.
JWT Structure
- • Header: Algorithm and token type
- • Payload: Claims and user data
- • Signature: Verification hash
- • Separated by dots (.)
Common Use Cases
- • Authentication debugging
- • API security testing
- • Token expiration checking
- • Claims inspection
Security Note: This tool only decodes the JWT payload. It does not verify the signature. Always validate JWT signatures server-side for security.