JWT Expiration Checker
Check whether a JWT is expired based on the exp claim. See human-readable expiry time and VALID or EXPIRED status.
Warning: This tool only decodes JWTs. It does not verify the signature.
Your generated secrets and hashes are processed locally in your browser whenever possible and are not stored on our servers.
Overview
Check whether a JWT is expired based on the exp claim. See human-readable expiry time and VALID or EXPIRED status.
Benefits
- Clear expired vs valid status
- exp and nbf awareness
- Local decode
- No token upload
Use Cases
- Access token debugging
- Session timeout support
- Cron job token checks
- Mobile auth issues
Users Also Use
How to Use
- Paste JWT.
- Click Check Expiration.
- Read status and timestamps.
FAQ
- What is exp?
- exp is the expiration time claim (Unix timestamp) after which the token should be rejected.
- Can expired tokens be trusted?
- Clients should reject expired tokens; servers must still verify signatures.
About JWT Expiration Checker
Quick expiration checks reduce auth debugging time. This tool reads exp locally so you can confirm whether refresh flows are needed.