STI Certificate & TNAuthList Decoder

Decode a STIR/SHAKEN certificate and — the part that matters — interpret its TNAuthList?: an SPC for a provider cert, or a TN / range for a delegate cert.

Runs entirely in your browser; no libraries, no network. ● client-side only   Guide →   PASSporT decoder →

Input

Paste a PEM certificate, or a base64 x5c value, or an x5u URL to fetch — or drag a .pem / .cer / .der file onto the page. Links from the PASSporT decoder pre-fill this automatically.