stir shaken certificate validator — free browser tool | fatcousin

drop stir/shaken passport · validate signer + attestation level · timeline + findings export · runs locally

input

drop stir/shaken passport + cert chain

PASSporT jwt · pem cert chain · origtn · attestation A/B/C · iat · multiple files

Select file

flags attestation C · expired iat · self-signed chain · tn mismatch · severity/reason per finding

limits

local parse only — no online cert revocation check · signature not verified without trusted CA keys · heuristic screener · not definitive proof

status

>ready