EMV Card Analyzer

EMV Card Analyzer is a developer utility for inspecting EMV card data and APDU communication in authorized test and diagnostic environments. It currently uses the Android device's built-in NFC reader to communicate with compatible cards.

Start an analysis to discover supported card applications and inspect the APDU exchange as it happens. Contextual decoding presents command headers, response status words, BER-TLV data, DOL values, application records, and payment-scheme-specific tags where their meaning is known.

Key features:

- Visa, Mastercard, and American Express application recognition
- live APDU command and response timeline
- contextual APDU, status-word, BER-TLV, and DOL decoding
- analysis summary with application and interface details
- browsable card tags and application records
- explicit completed, partial, unsupported, interrupted, and failed results
- copy raw APDUs and decoded values
- local history with result filters and persistent notes
- summary and detailed Markdown, HTML, and PDF diagnostic reports
- local report saving and user-initiated sharing
- no account, advertising, analytics, or network connection required

EMV Card Analyzer is a bounded diagnostic reader, not a certified payment kernel. It does not provide payment, banking, wallet, money-transfer, or other financial services. It cannot make purchases or verify PINs and is intended exclusively for authorized development, diagnostics, and controlled test environments.

Requirements:

- Android device with NFC reader support
- NFC enabled
- compatible EMV card that you are authorized to inspect

Support depends on the card technology, card application, and available records. Complete legacy magstripe flows are not implemented. Some cards may update internal counters when commands are processed. External card readers, including readers for contact cards, are not currently supported.