JWT Creator
Generate JSON Web Tokens with custom claims and signature
JWT Configuration
Algorithm & Secret
Standard Claims
Generated Token
Configure the JWT settings above and click "Create JWT Token"
JWT Information
About JSON Web Tokens
JSON Web Tokens (JWT) are a compact, URL-safe means of representing claims to be transferred between two parties.
Common Use Cases:
- • Authentication and authorization
- • Secure information transmission
- • Single sign-on (SSO)
- • API access tokens
- • Session management
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Try Now Password GeneratorWhat is JWT Creator?
A JWT Creator is a powerful tool for generating JSON Web Tokens (JWTs) with custom claims and digital signatures for authentication and secure data transmission. Our JWT Creator allows you to build tokens with standard claims (like issuer, audience, subject, and expiration) as well as custom claims specific to your application needs. The tool supports multiple HMAC signing algorithms (HS256, HS384, HS512) and provides a user-friendly interface for configuring token headers, payloads, and signatures. Whether you're developing authentication systems, testing API integrations, or creating secure tokens for microservices communication, this creator provides the flexibility to generate properly formatted, signed JWTs that comply with industry standards. The tool processes everything client-side, ensuring your secret keys and sensitive data remain completely private and secure.
When to Use JWT Creator
Use our JWT Creator when developing or testing authentication systems, creating tokens for API access, or building secure communication between services. This tool is essential during application development when you need to test JWT-based authentication flows without setting up a complete backend system. Developers commonly use it when prototyping authentication mechanisms, creating test tokens for frontend development, or generating tokens for API testing and debugging. It's particularly valuable when integrating with third-party services that require JWT authentication, setting up microservices communication, or when you need to understand how different claims affect token structure and size. The creator is also useful for educational purposes, helping developers learn how JWTs work and experiment with different configurations safely.
How to Use JWT Creator
7 stepsSelect your preferred signing algorithm (HS256 recommended for most uses)
Enter your secret key for signing the token (keep this secure)
Configure standard claims like issuer, audience, subject, and expiration time
Add any custom claims your application requires (user ID, roles, permissions)
Set the token expiration time based on your security requirements
The JWT generates automatically as you configure claims and settings
Copy the generated token for use in your applications or testing
Privacy & Security
100% SecureAll JWT token creation occurs entirely within your web browser using client-side JavaScript. Your secret keys, claims data, and generated tokens never leave your device or get transmitted to our servers. This ensures complete privacy and security for sensitive authentication information, API keys, or any confidential data included in your tokens. The tool works offline once loaded, providing maximum security for production token generation.
Pro Tips
7 tipsKeep your secret keys secure and never share them publicly or in client-side code
Use strong, random secret keys with sufficient entropy for production tokens
Set appropriate expiration times - shorter for higher security, longer for convenience
Include only necessary claims to keep token size manageable
Use standard claim names (iss, aud, sub) for better interoperability
Test tokens with our JWT Decoder to verify they contain expected claims
Consider using refresh tokens for long-lived authentication sessions
Frequently Asked Questions
5 Q&AQ1:What is a JWT token and why would I create one?
JWT (JSON Web Token) is a secure way to transmit information between parties as a JSON object. You create JWTs for user authentication, API authorization, secure data transmission, and stateless session management in web applications and APIs.
Q2:Which signing algorithm should I use for my JWT tokens?
For most applications, HS256 (HMAC with SHA-256) is recommended as it's secure, fast, and widely supported. Use HS384 or HS512 for higher security requirements. The choice depends on your security needs and performance requirements.
Q3:What's the difference between standard and custom claims?
Standard claims (iss, aud, sub, exp, iat, nbf, jti) have predefined meanings in the JWT specification. Custom claims are application-specific data you add to carry user information, permissions, or any other data your application needs.
Q4:How do I set the correct expiration time for my tokens?
Token expiration depends on your use case. Short-lived tokens (15-30 minutes) are more secure but require frequent renewal. Longer tokens (hours or days) are more convenient but increase security risk. Consider using refresh tokens for the best balance.
Q5:Is it safe to create JWT tokens with this tool?
Yes, all JWT creation happens locally in your browser using client-side JavaScript. Your secret keys and token data never leave your device or get sent to our servers, ensuring complete security for sensitive authentication information.
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