ConvertEpic Security

JWT Debugger

Decode, inspect, and verify JSON Web Tokens locally in your browser.
100% Private. Your authentication secrets never touch a server.

{}
{}
HMACSHA256(
  base64UrlEncode(header) + "." +
  base64UrlEncode(payload),
  your-256-bit-secret
)
Encoded Signature Hash: Awaiting token input...

Understanding JSON Web Tokens

A JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties. In modern web development, JWTs are the standard for stateless authentication and identity sovereignty.

🛡️ Security Warning

JWTs are encoded, not encrypted by default. Anyone with the token can read your payload. Never store passwords or sensitive PII inside the claims.

🔒 Zero-Knowledge Debugging

Most online debuggers log your tokens on their backend. ConvertEpic executes all decoding logic via local JavaScript, ensuring your production secrets stay private.

🚀 Tactical Workflow

Quickly verify exp (expiration), iat (issued at), and custom scopes. Perfect for debugging Python-based backends using Django REST Framework or FastAPI.