JWT Token Encoder

Create and sign JSON Web Tokens (JWT) with custom headers and payloads. This tool supports HMAC algorithms (HS256, HS384, HS512) and allows you to build tokens for authentication and information exchange. All processing happens locally in your browser for maximum privacy and security.

JWT Configuration

Algorithm

HS256

All algorithms are supported. HMAC algorithms (HS*) use shared secrets, while RSA/ECDSA algorithms (RS*/ES*/PS*) use public-private key pairs.

Secret Key

Keep this secret secure! It's used to sign and verify your tokens.

Header

Payload

Security Notice

This tool generates JWT tokens locally in your browser. Never share your secret keys with untrusted parties. In production environments, always use strong, randomly generated secret keys and consider using asymmetric algorithms (RS256, ES256) for better security.