JWT Encoder
Create and encode JSON Web Tokens (JWT) with custom headers, payloads, and signatures. Generate secure tokens for authentication and authorization purposes.
Creating JWT (JSON Web Tokens)
JSON Web Tokens (JWT) are a secure way to transmit information between parties. This encoder helps you create JWTs with custom payloads and signatures for authentication and authorization purposes.
Encoding Process
The JWT encoding process involves three steps: creating the header with algorithm information, encoding your payload data, and generating a signature to ensure token integrity and authenticity.
Supported Algorithms
HMAC Algorithms
Hash-based Message Authentication Code (HMAC) algorithms use a shared secret key. HS256 is the most commonly used and is fully supported in browsers.
RSA Algorithms
RSA algorithms use public/private key pairs. Note: Full RSA signing is not available in browsers due to security limitations. Use server-side implementations for production RSA tokens.
Security Best Practices
Always use strong secret keys, never expose secrets in client-side code, set appropriate expiration times, and validate tokens on the server side. This tool is for development and testing purposes.
Common Use Cases
JWTs are used for user authentication, API authorization, secure information exchange, stateless session management, and single sign-on (SSO) implementations across web applications.