JWT Expiry Checker - Verify Token Expiration Online
Check if a JWT has expired and see exactly when it expires or expired, decoded instantly and locally.
Related tools & use cases
How to use JWT Expiry Checker - Verify Token Expiration Online
- 1Paste your JWT.
- 2See the token's expiry status, exact timestamp, and relative time.
- 3Copy the payload if you need the raw claims.
Privacy & security
Your token is decoded entirely in your browser — never sent anywhere.
Nothing is transmitted.
Frequently asked questions
How is expiry determined?
The exp claim in the payload is a Unix timestamp. If it's earlier than the current time, the token is expired.
Checking JWT Token Expiry Online
Every JWT that includes an exp (expiration) claim can be checked for validity by comparing that timestamp against the current time — a common debugging step when an API unexpectedly rejects a request as unauthorized.
Common use cases
Debugging 401 Unauthorized Errors
Quickly confirm whether an API rejection is due to an expired token rather than a permissions or configuration issue.
Tips for best results
- A token without an exp claim never expires by JWT convention — check your issuer's documentation for how it enforces expiration in that case.
More questions answered
Does checking expiry verify the token is genuine?
No. Expiry checking only reads the exp claim from the payload, which anyone can read. It doesn't confirm the signature is valid — that requires server-side verification with the signing secret.