JWT Creator
Generate JSON Web Tokens with custom claims and signatures. Includes decoded preview and expiration helpers.
Standard Claims
Custom Claims
Learn More About JWT
Want to understand how JWT tokens work? Check out our comprehensive guide covering JWT structure, security, and best practices.
Read the complete JWT guide →How to Use
- 1
Configure header
Select the signing algorithm (HS256, HS384, or HS512).
- 2
Set claims
Fill in standard claims (iss, sub, aud, exp, etc.) and add custom claims as needed.
- 3
Set secret
Enter the secret key for signing the token.
- 4
Generate
Click Generate to create the JWT and see a decoded preview.
A JSON Web Token (JWT) is a compact, URL-safe token format for securely transmitting claims between parties. It consists of a header, payload, and signature. JWTs are commonly used for authentication and API authorization.
- •Testing authentication flows
- •Creating mock tokens for development
- •Debugging JWT-based APIs
- •Learning JWT structure
- •Prototyping authorization systems
Security Note: Never use tokens generated here in production with real secrets. This tool is for testing and learning purposes.