Paste any JWT and instantly decode its header and payload into human‑readable JSON. The tool checks the `exp` (expiry) claim and clearly indicates whether the token is still valid or has already expired. Entirely browser‑side – your token never leaves your machine.
No. This tool only decodes, it does not verify the cryptographic signature. It is meant for inspecting token contents, not validating trust.
The status will display “No expiration claim” and the tool will not calculate an expiry time.
Yes, as long as the token follows the standard JWT format (three base64url‑encoded segments separated by dots). Works for access, ID, and refresh tokens from Auth0, Firebase, Okta, etc.