JWT Inspector & Decoder
Read JWT header, payload and expiry locally. No signatures are validated and no data is sent away.
Security: decoding is not verification. Do not trust unverified claims or paste sensitive credentials into an unfamiliar site.
Fast, local and straightforward.
Use the result as a starting point; review important decisions independently.
Enter your data
Use sample data or paste your own information.
Run the tool
Calculation or transformation happens immediately in your browser.
Check and use the result
Copy or download the result, then verify before production use.
Good to know.
Does this tool send my content to a server?
No. Calculations and transformations are performed locally in your browser; normal website analytics may still record page visits.
Can AI agents call this as an API?
Not as a network API. It is an interactive browser tool and can be used by automated browsers; no backend endpoint is provided.