Developer Tools
Check whether a JWT is expired and inspect exp, iat, and token timing claims instantly.
Use this free JWT Expiry Checker to see whether a JSON Web Token is expired, still valid, or close to expiring. It is useful for debugging authentication issues, failed API requests, session problems, and token refresh logic. Paste a JWT token to inspect expiration-related claims such as exp and iat, understand token timing, and confirm whether time-based auth issues are causing the problem.
Use this free JWT Expiry Checker to see whether a JSON Web Token is expired, still valid, or close to expiring. It is useful for debugging authentication issues, failed API requests, session problems, and token refresh logic. Paste a JWT token to inspect expiration-related claims such as exp and iat, understand token timing, and confirm whether time-based auth issues are causing the problem.
Use jwt expiry checker when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
JWT Expiry Checker is focused on one question: is the token expired, still valid, or close to expiring? JWT Decoder is broader and helps you inspect the whole token content. Use the expiry checker when timing is your main concern and the decoder when you need the full picture.
JWT Expiry Checker is best for token lifetime troubleshooting. JWT Parser is better when you want to inspect structure, claims, roles, issuer, audience, and other payload details in a more general way. If you are debugging session timing, expiry checking is usually the faster first step.
If you need to inspect the full token content, open JWT Decoder or JWT Parser. If a token claim contains encoded text or nested JSON, you may also want Base64 Decoder and JSON Formatter.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2VyMSIsImV4cCI6MTYwMDAwMDAwMCwiaWF0IjoxNTk5OTk2NDAwfQ.signature
Output
Expired token with exp and iat details
Useful when an old token still exists in storage and API requests suddenly start failing.
Input
eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2VyMSIsImV4cCI6MTg5MzQ1NjAwMCwiaWF0IjoxODkzNDUyNDAwfQ.signature
Output
Valid token with future expiration
Helpful when you want to confirm the token itself is still active.
Input
eyJhbGciOiJIUzI1NiJ9.eyJleHAiOjE4OTM0NTYwMDB9.signature
Output
Expiration claim found and evaluated
Useful when the payload is minimal and you only care about expiry.
Input
eyJhbGciOiJIUzI1NiJ9.eyJpYXQiOjE4OTM0NTI0MDAsImV4cCI6MTg5MzQ1NjAwMH0.signature
Output
Issued-at and expiration timing details
Helpful when checking token lifetime length or refresh timing.
Input
eyJhbGciOiJIUzI1NiJ9.eyJleHAiOjE4OTM0NTI3MDAsImlhdCI6MTg5MzQ1MjQwMH0.signature
Output
Short-lived token with near expiry
Useful when users are being logged out too quickly or requests fail after a short delay.
Input
eyJhbGciOiJSUzI1NiJ9.eyJzdWIiOiJ1c2VyLTEiLCJhdWQiOiJhcGkiLCJleHAiOjE4OTM0NTYwMDB9.signature
Output
Expiration status and related timing claims
Good for ruling out expiry before investigating audience or permission issues.
Input
eyJhbGciOiJIUzI1NiJ9.eyJleHAiOjE4OTM0NTYwMDB9
Output
Invalid JWT
A JWT checker needs a full token structure to inspect timing claims reliably.
Input
eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2VyMSIsImlhdCI6MTg5MzQ1MjQwMH0.signature
Output
Token parsed but no exp claim found
Useful when checking why a token cannot be evaluated for expiration directly.
Fix: Expired and invalid are not always the same. A token can be well-formed but no longer usable because of time-based claims.
Fix: Compare token timestamps carefully and confirm system time is correct where the token is being used.
Fix: Expiry checking focuses on timing claims. Signature validation is a separate step.
Fix: Paste the full JWT so the payload can be read correctly.
Fix: iat usually shows when the token was issued, while exp shows when it should expire.
A JWT expiry checker reads token timing claims such as exp and helps you see whether the token appears expired or still valid.
JWT Expiry Checker focuses on time-based token status, while JWT Decoder gives a broader view of the header and payload.
If the token includes an exp claim, the checker can compare that timestamp with the current time to determine whether it has expired.
exp is the expiration timestamp that indicates when the token should no longer be accepted.
iat usually stands for issued at and shows when the token was created.
A JWT can decode successfully and still fail because it is expired, issued for the wrong audience, or otherwise not valid for the current request.
Yes. A token may parse and decode correctly but still be expired or fail signature or audience checks.
If there is no exp claim, the checker cannot determine expiration directly from the token payload.
No. Expiry checking only looks at timing claims. Signature validation is separate.
Use JWT Parser or JWT Decoder when you want broader token inspection, not just expiration and timing details.