Our comprehensive JSON Web Token (JWT) tool provides everything you need to work with JWTs in development and production environments. Generate, decode, and verify tokens with support for multiple algorithms and comprehensive validation.

Supported Features

• JWT Decoding with header and payload extraction
• Signature verification for multiple algorithms
• Token generation with customizable claims
• JWKS (JSON Web Key Set) support
• Natural language expiry parsing
• Comprehensive validation reports
• Color-coded token visualization
• Security-first local processing

Supported Algorithms

• HMAC: HS256, HS384, HS512
• RSA: RS256
• ECDSA: ES256
• Symmetric and asymmetric key support
• Public/private key verification
• JWKS kid matching

Why Use Our JWT Tool?

Built for developers by developers, this tool offers professional-grade JWT handling with enterprise security features. All processing happens locally in your browser, ensuring your sensitive tokens and keys never leave your machine.

🔒 Privacy First

All JWT processing happens locally. No data is transmitted to servers.

⚡ Fast & Reliable

Instant processing with comprehensive error handling and validation.

🛠 Developer Friendly

Helper buttons, natural language parsing, and detailed reports.

Common Use Cases

• API Development: Generate and test authentication tokens

• Security Audits: Decode and analyze existing tokens

• Integration Testing: Verify token signatures and claims

• Debugging: Inspect token structure and expiration times

• Educational: Learn JWT format and security practices