JWT Analyzer
Token Security Assessment
JSON Web Tokens are the standard for modern auth, but implementation flaws are common. Analyze your tokens for weak signatures, algorithm confusion ("none" algo), and information leakage.
Attacks:None Algo, Weak Key, Key Confusion
Token Decoded
{
"header": {
"alg": "HS256",
"typ": "JWT"
},
"payload": {
"sub": "1234567890",
"name": "John Doe",
"admin": false,
"iat": 1516239022
},
"analysis": [
{
"severity": "High",
"issue": "Weak Secret",
"desc": "Signature verified with common secret 'secret123'"
},
{
"severity": "Critical",
"issue": "None Algo",
"desc": "Token accepted with 'alg': 'none'"
}
]
}Key Features
1
Signature Verification
Checks validity of signatures against public keys or secrets.
2
Attack Simulation
Red Team mode suggests modifications to bypass checks (e.g., Algo "None").
3
Data Decoding
Instantly view header and payload claims in a readable format.
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