Decode and analyze JSON Web Tokens with detailed payload inspection, security validation, and expiration checking.
JWT Token Input
Enter your JSON Web Token to decode and analyze its contents
0 characters
Standard JWT Claims
Common claims found in JWT tokens and their meanings
issIssuer
The issuer of the JWT
subSubject
The subject of the JWT
audAudience
The recipients that the JWT is intended for
expExpiration Time
The expiration time on or after which the JWT must not be accepted
nbfNot Before
The time before which the JWT must not be accepted
iatIssued At
The time at which the JWT was issued
jtiJWT ID
A unique identifier for the JWT
JWT Security
• Tokens are decoded client-side for security
• No sensitive data is sent to external servers
• Signature verification requires the secret key
• Always validate tokens on your server
• Check expiration times before using tokens
• Use HTTPS for token transmission
Use Cases
• API authentication and authorization
• Debugging JWT-based authentication issues
• Inspecting token claims and metadata
• Verifying token expiration and timing
• Development and testing workflows
• Security auditing and token analysis
Professional JWT Token Analysis and Security Validation
JWT decoding tools are essential for API development, authentication debugging, and security analysis workflows. Professional JWT decoders enable developers to inspect token contents, validate claims, and troubleshoot authentication issues while maintaining security best practices for token handling and validation in modern web applications.
Security Applications:
API authentication debugging and token inspection workflows
Security auditing and vulnerability assessment for JWT implementations
Token claim validation and authorization rule verification
Development and testing of JWT-based authentication systems
Integration testing for OAuth 2.0 and OpenID Connect flows
Token lifecycle management and expiration monitoring
Professional Features:
Client-side decoding for maximum security and privacy
Comprehensive token validation including expiration checking
Detailed claim analysis with standard JWT claim reference
Algorithm and signature format identification
Time-based claim validation with human-readable formatting
Copy-to-clipboard functionality for development workflows
This tool provides enterprise-grade JWT analysis with professional security standards for developers, security engineers, and system administrators requiring reliable token inspection and validation for authentication system development and maintenance.