TLV Parser

Parse EMV Tag-Length-Value data structures.

TLV Hex Data

Decoded structure

EMV TLV

Each object contains a tag, a byte length and a value. Constructed tags contain further TLV objects. Known names come from the EMV tag dictionary; unknown tags remain visible.

Paste data bytes only. Remove APDU SW1/SW2 status bytes such as 90 00 before parsing. DOLs and positional format-1 responses are not nested TLV.

00 and FF bytes between objects are shown as padding. Indefinite lengths are rejected.

EMV Tag Dictionary →

Limits

65,536 decoded bytes, 2,048 nodes and 32 nesting levels. Offsets start at zero. Malformed boundaries produce an error rather than a partial result.

Worked example

The example decodes an FCI template with AID A0000000031010, label VISA and issuer code table index 01.

Small card. Plenty to discover.

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