workflow · developer
JWT Debug Workflow
Debug JWT auth issues: decode token, check exp/alg, reproduce API with cURL. Free developer tools.
Updated 2026-05-21
Steps
- Paste token Inspect header and payload; note exp and alg. Open tool →
- Validate JSON claims Copy payload JSON if you need structure checks. Open tool →
- Reproduce API call Paste failing Authorization header from DevTools as cURL. Open tool →
FAQ
- How do I check if a JWT is expired?
- Decode with JWT decoder and read the exp claim (Unix timestamp).
- Can I verify the signature in browser?
- Decoder shows payload; signature verification needs your secret in backend code.
- API still returns 401 after refresh?
- Use cURL parser to compare Authorization headers between working and failing calls.