APDU Response Debugger

Paste a complete APDU response (data + SW1 SW2) and get an instant byte-level breakdown. Understand what 61XX, 63CX, 69XX, and 6A82 actually mean — with protocol-specific debugging hints and next-step suggestions.

How to Use

Paste the full APDU response bytes as received from the card. The tool separates the response data from the SW1 SW2 status bytes, then decodes each field. It also suggests what to do next — e.g., "61 XX → Send GET RESPONSE with Le=XX" or "63 CX → PIN try counter is X, handle retry or block".

Related Tools

APDU Command Builder — Build commands | APDU Status Word Lookup — Search all SW | ISO 7816 Complete Guide