JWT Token Generator
Generate secure JWT tokens with custom claims and multiple signing algorithms. Perfect for testing and development.
JWT Token Generation Guide
What is JWT Token Generation?
JWT (JSON Web Token) generation is the process of creating secure, encoded tokens that can carry data between parties. These tokens are signed to ensure their integrity and can be used for authentication, information exchange, and authorization in web applications.
Key Components of JWT Tokens
- Header: Contains token type and signing algorithm
- Payload: Contains claims and data
- Signature: Ensures token authenticity
- Secret Key: Used for token signing
Common Token Claims
- sub (Subject): Entity identifier
- iat (Issued At): Token creation time
- exp (Expiration): Token expiry time
- Custom Claims: Additional data fields
Signing Algorithms
- HS256/384/512: HMAC with SHA-256/384/512
- RS256/384/512: RSA with SHA-256/384/512
- ES256/384/512: ECDSA with SHA-256/384/512
Best Practices
- Use strong, unique secret keys
- Set appropriate token expiration times
- Avoid storing sensitive data in payload
- Choose appropriate signing algorithms
Frequently Asked Questions
What is the ideal token expiration time?
Token expiration time depends on your security requirements. Access tokens typically last 15-60 minutes, while refresh tokens can last longer.
Which algorithm should I choose?
For most applications, HS256 provides good security. For higher security requirements, consider using HS384 or HS512.
Are JWT tokens encrypted?
Standard JWT tokens are encoded and signed but not encrypted. Sensitive information should not be stored in the payload.