JWT Token
Check JWT expiry — is your token expired?
Paste a JWT and instantly see whether it is expired, the exact expiry timestamp, time remaining, and key claims like iss, sub, and aud. Decoding happens locally — real tokens never leave your browser.
Frequently Asked Questions
- How does JWT expiration work?
- The exp claim holds a Unix timestamp. Verifiers reject the token once current time passes exp. This tool converts it to a readable date and computes time remaining.
- Why does my token expire sooner than expected?
- Check whether exp is in seconds (standard) — a value in milliseconds parses as a date far in the future or past. Also confirm the issuing server's clock and timezone assumptions.
- Is it safe to paste a real production token?
- The token is decoded entirely in your browser with no network request. That said, an expired test token is always the safer thing to share or inspect.
- What is the difference between exp, iat, and nbf?
- iat is when the token was issued, nbf is the earliest time it is valid, and exp is when it stops being valid. All are Unix timestamps in seconds.