JWT Playground - Interactive JWT Testing & Practice
Interactive sandbox to test JWT scenarios and practice ethical hacking techniques. Test JWT security vulnerabilities, practice token manipulation, and learn JWT attacks in a safe environment.
Attack Scenarios
Token Manipulation
Strength: Medium (11 characters)
Practice Exercises
- Load the "Algorithm none" scenario and try to modify the payload
- Use the Cracker tool to brute force the weak secret token
- Analyze tokens with the Analyzer to find vulnerabilities
- Try modifying tokens and see if they still verify
- Test the "kid injection" scenario - see how the kid header can be manipulated
- Examine the "JWKS spoofing" token - understand how external key sources can be exploited
- Load "Claim injection" and see how malicious claims can be added
- Study the "Algorithm confusion" attack - understand RS256 to HS256 conversion
- Check "Token in URL" scenario - understand why tokens shouldn't be in URLs
- Analyze "Predictable JTI" - see how predictable IDs can be exploited
- Examine "Missing Validation" - understand the risk of unvalidated claims
- Review "Weak Randomness" - see why secure random generation matters
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