Back to Tools
JWT Information
What is JWT?
- JSON Web Token standard
- Compact, URL-safe token format
- Used for authentication and authorization
- Self-contained with claims
JWT Structure
- Header: Algorithm and token type
- Payload: Claims and data
- Signature: Verification signature
- Separated by dots (.)
Security Features
- Digital signature verification
- Expiration time validation
- Issuer and audience checks
- Algorithm specification
JWT Security Tips
Token Security
- Use strong algorithms (RS256, ES256)
- Set appropriate expiration times
- Include all standard claims
- Validate signatures properly
Key Management
- Use asymmetric keys when possible
- Rotate keys regularly
- Store keys securely
- Use key versioning
Common Issues
- Using weak algorithms
- Missing standard claims
- Long expiration times
- Sensitive data in payload