Decode and inspect JSON Web Tokens with comprehensive analysis including header, payload, signature, and security validation. Essential tool for developers debugging authentication and API security.
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Our advanced JWT token decoder provides comprehensive analysis and inspection capabilities for JSON Web Tokens, helping developers debug authentication issues and ensure security compliance.
Our decoder uses advanced parsing algorithms to safely decode and analyze JWT tokens while maintaining security and providing comprehensive insights.
Paste your JWT token or upload a file containing the token. Our tool validates the format and prepares for analysis.
Advanced algorithms decode header, payload, and signature while performing security validation and expiration checks.
Get comprehensive insights including claims analysis, security warnings, and formatted JSON output for easy inspection.
Our JWT token decoder provides comprehensive analysis features for professional development and security workflows.
Discover how our JWT token decoder can help you in various development and security scenarios.
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{
"alg": "HS256",
"typ": "JWT"
}{
"sub": "1234567890",
"name": "John Doe",
"iat": 1516239022,
"exp": 1516242622
}Explore how our tool integrates into modern development and security workflows.
Decode JWT tokens to verify claims, check expiration times, and debug authentication issues in API endpoints
Validate token structure and claims before implementing authentication logic in your applications
Inspect tokens during development to ensure proper claim generation and token structure
Analyze JWT tokens for security vulnerabilities, weak algorithms, and improper claim usage
Verify token compliance with security standards and best practices for JWT implementation
Decode tokens during security incidents to analyze potential breaches and token misuse
Get answers to common questions about JWT token decoding and our tool's capabilities.
Yes, our tool processes JWT tokens entirely in your browser (client-side). No token data is sent to our servers, ensuring complete privacy and security. JWT tokens are designed to be publicly readable - only the signature verification requires the secret key.
No, this tool only decodes and displays JWT components. Signature verification requires the secret key and should be performed by your application server. This tool helps you inspect token contents and structure for debugging purposes.
Our decoder can display tokens using any algorithm (HS256, RS256, ES256, etc.). The algorithm information is shown in the header, but actual verification requires the corresponding secret or public key on your server.
Our tool automatically checks the "exp" (expiration) claim and displays whether the token is expired or valid, along with the exact expiration time and time remaining. This helps you debug authentication issues quickly.
Custom claims are application-specific data stored in the JWT payload beyond the standard claims (iss, sub, aud, exp, etc.). Our tool identifies and displays both standard and custom claims separately for easy analysis.
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