JWT Security Inspector
Decode JWTs, inspect expiry, issuer, audience, algorithm choices, and common token security mistakes.
JWT Security Inspector is for debugging authentication failures while keeping pasted tokens local and reminding developers that decoded claims still require signature verification.
What is JWT Security Inspector?
JWT Security Inspector is for debugging authentication failures while keeping pasted tokens local and reminding developers that decoded claims still require signature verification.
Decode JWTs, inspect expiry, issuer, audience, algorithm choices, and common token security mistakes.
How to use JWT Security Inspector?
Step 1
Try the included example input, then replace it with a redacted sample from the system you are debugging.
Step 2
Paste a JWT token into the inspector.
Step 3
Optionally enter expected issuer and audience values.
Step 4
Review expiry, algorithm warnings, claims, and the security checklist.
Example input / output
Use JWT Security Inspector to inspect a representative sample, confirm the result and continue to a related validation, conversion or comparison step if needed.
Compare the generated output with the included expected result and check that meaningful values were preserved.
Example input
eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0...Example output
Header, claims, expiry status, issuer/audience checks, weak-algorithm warnings, and a security checklist.Practical developer examples
Check a copied value
Use JWT Security Inspector on a small, redacted sample from a request, response, Log, test fixture or configuration file. Compare the result with the source before reusing it.
Document the result
Include the relevant input, selected action, output and expected behavior in a ticket or code review so another developer can reproduce the same check.
Common developer use cases
JWT Security Inspector handles a focused transformation or inspection in the browser so you can answer one debugging question without creating a temporary script or project file.
Common issues
FAQ
Does JWT Security Inspector send data to a server?
The interactive transformation is handled in the browser in this frontend build. Analytics and advertising scripts may still load separately for site measurement or ads readiness, so avoid pasting active secrets or regulated personal data.
What input works best in jwt security inspector?
Paste raw JWT tokens directly into the input area or use the example button for a quick starting point.
Can I share JWT Security Inspector output with teammates?
Yes, but review the result first and redact tokens, private keys, customer data, internal URLs, account IDs, and other sensitive values before sending it in a ticket, chat, or pull request.