EMV TLV Decoder

Paste card-terminal capture data (e.g. an FCI template, READ RECORD response, or GENERATE AC reply) and get a labelled, indented tree. Each tag is matched against a built-in EMV Book 3 / Book 4 dictionary, constructed templates are recursed into, and values are shown as hex with an ASCII preview when printable. Runs entirely in your browser — your capture never leaves the page.