How to Debug JWT ‘Invalid Signature’ and ‘Expired’ Errors in Node.js

1. 1Check JWT token expiration using a tool like jwt.io to verify the token's validity
2. 2Verify the secret key used for signing and validating the token
3. 3Use a debugger or console logs to inspect the auth middleware and identify the source of the error
4. 4Compare the expected and actual signatures to detect any discrepancies
5. 5Test the token validation process using a testing framework like Jest or Mocha to ensure correctness

Backend developers and cybersecurity teams can benefit from this knowledge to troubleshoot and secure their authentication systems

💡 Invalid signature and expired errors can be resolved by verifying token expiration, secret keys, and signature validation

🚨 Debug JWT errors in Node.js! 🚨