Free Online JWT Encoder Tool
Create secure JSON Web Tokens (JWT) instantly. Our tool helps you generate standards-compliant JWTs with custom claims and signatures using HS256, RS256, and other common algorithms.
Perfect for API development, authentication testing, and backend services. All encoding happens securely in your browser - your secrets never leave your device.
How to Encode JWTs in 3 Steps
- Enter your payload - Add custom claims or use our template
- Set your secret/key - Choose algorithm and signing method
- Click "Encode JWT" - Get a fully signed token ready for use
JWT Encoder Features
- Multiple algorithms - HS256, HS384, HS512, RS256 support
- Claim templates - Pre-configured exp, iat, iss claims
- Real-time validation - Syntax checking as you type
- Secure processing - All encoding happens client-side
Common JWT Use Cases
- API authentication - Generate test tokens for development
- Microservices - Create service-to-service tokens
- Mobile apps - Generate OAuth tokens for testing
- Web applications - Prototype session tokens
Why Use JWT Encoding?
Development Benefits
- Test authentication flows without backend services
- Prototype token-based systems quickly
- Debug authorization issues more efficiently
Security Advantages
- Client-side processing keeps secrets private
- No token storage or server logging
- Standardized format reduces implementation errors