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💳 EMV Tools
EMV · Chip & Contactless

EMV tools that explain themselves.

Decode raw EMV data and actually understand what it means — TVR, TSI, AIP, Terminal Capabilities and more, broken down bit by bit against the EMV specification. No install, no upload: everything runs locally in your browser.

Open the TLV Parser → See what's available
95 05 80 00 80 00 00 → Tag 95 Terminal Verification Results byte 1: bit 8 set → Offline data authentication was not performed 9F33 03 E0 F8 C8 → Tag 9F33 Terminal Capabilities CVM: Enciphered PIN (online), Signature, No CVM required

Available tools

We're starting with the tool EMV work leans on most, and adding more from here.

TLV

EMV TLV Parser

Paste raw BER-TLV data (from a card, terminal log, or test tool) and get every tag decoded — name, length, value, and a bit-by-bit breakdown for TVR, TSI, AIP, Terminal Capabilities and CVM Results.

Open tool →
Coming soon
AC

Cryptogram / AC Tools

Application Cryptogram context and Issuer Script inspection utilities.

Not yet available
Coming soon
CAP

Capability Builders

Build valid Terminal Capabilities, Additional Terminal Capabilities and TTQ values from checkboxes instead of memorizing bit tables.

Not yet available

What this is based on

Tag structure and data formats follow EMV Book 3 (Application Specification), Annex B — Rules for BER-TLV Data Objects. Bit-level breakdowns for TVR, TSI, AIP, Terminal Capabilities and CVM Results follow the same publicly documented EMV tag tables used across the industry. This tool is provided for development, testing and educational use; always verify against the current EMV specification for production or certification work.