🔐 JWT Decoder & Verifier
Decode JWT tokens to view header, payload, and verify signatures
🔑
JWT Token
No Token
📋 Header
Header will appear here...
📄 Payload
Payload will appear here...
🔒 Signature Verification
Upload a public key to verify RS256 signatures:
💡 Sample JWT Tokens
Try these examples to test the decoder:
About JWT Decoder & Verifier
Our free online JWT decoder and verifier helps developers inspect and validate JSON Web Tokens. Whether you're debugging authentication issues, verifying API tokens, or learning about JWT structure, our tool provides comprehensive token analysis.
Features
- JWT Decoder: Decode JWT tokens to view header and payload
- Signature Verification: Verify RS256 signatures with public keys
- Expiry Reporting: Check token expiration and validity
- Token Information: Display key token metadata and claims
- Public Key Support: Upload PEM format public keys
- Security Analysis: Identify potential security issues
How to Use
- Paste your JWT token into the input area
- Click "Decode JWT" to view header and payload
- Upload a public key to verify signatures
- Review token information and expiry status
- Check for security warnings and recommendations
Common Use Cases
- ✅ Debugging: Inspect JWT tokens for authentication issues
- ✅ API Development: Verify token structure and claims
- ✅ Security Testing: Validate token signatures and expiry
- ✅ Learning: Understand JWT structure and components
- ✅ Compliance: Check token security and best practices