JWT Tool

JWT Token

HEADER

Algorithm & Token Type

⚠️ Security Testing

Quick buttons for testing none algorithm vulnerabilities. For educational and authorized security testing only.

PAYLOAD

Data

SIGNATURE

Secret Key (for HMAC algorithms)

This tool generates JWT tokens using HMAC-SHA256 (HS256). The signature is created using the secret key you provide. Remember: Never share your secret keys!

Signature (base64url encoded)

About JWT (JSON Web Token)

JWT is an open standard (RFC 7519) for securely transmitting information between parties as a JSON object. It consists of three parts: Header (algorithm & token type), Payload (claims/data), and Signature (verification). For more information, visit jwt.io or check jwt-hack for security testing.