See every byte between terminal and card: live APDU capture, decode and replay. Built for studying real transactions and scripting your own test flows against any PCSC card.
SNIFFER
Feature
Detail
Capture
Live APDU stream from any PCSC reader, hex + decoded side by side
Decode
TLV parser: tags expanded per EMV book 3, nested templates folded
Filters
Command class filter, byte-pattern highlight, session markers
Replay
Any captured command re-sent, modify field then resend - diff responses
Export
Session log to text/JSON, share for debugging
SCRIPT TOOLKIT
Script language: simple command files with variables and loops
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