JWT Fuzzer
Professional JWT fuzzing tool for security testing and vulnerability assessment
About JWT Fuzzing
JWT Fuzzer is a security testing tool that generates malformed JWT tokens to identify vulnerabilities in JWT implementations.
Key Features
- Generate tokens with invalid signatures
- Create tokens with expired or future timestamps
- Modify header algorithms (none, RS256 to HS256, etc.)
- Inject malicious payloads (XSS, SQLi, etc.)
Security Testing Guide
How to use this tool to test your JWT implementation security
Testing Steps
- Select fuzzing parameters (algorithm, payload, etc.)
- Generate test tokens
- Send tokens to your API endpoint
- Analyze responses for vulnerabilities
Security Best Practices
- Always validate token signatures
- Reject tokens with "none" algorithm
- Verify token expiration (exp claim)
- Use strong secret keys
JWT Fuzzer
Generate fuzzed JWT tokens for security testing by manipulating headers, payloads, and signatures