JWT Creator
Generate JSON Web Tokens with custom claims and signatures. Includes decoded preview and expiration helpers.
Standard Claims
Custom Claims
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.