EMV TLV Decoder
Decode EMV / BER-TLV hex (ISO 8583 field 55, chip data) into named tags.
Tool inputs stay in your browser · optional AI search sends your query
Good to know: Handles multi-byte tags, long-form lengths and nested (constructed) templates. Tag names from the EMV specification.
How to use it (step by step)
- 1Type or paste your text into the “TLV hex” box. There is already an example in it so you can see how it works; press Clear to start with your own.
- 2The answer appears right away in the “Decoded tags” box. No button needed.
- 3Press Copy and paste the result wherever you need it.
Words to know
- ISO 8583
- The common “language” card machines and banks use to send payment messages to each other.
- EMV / chip data
- The information inside a card’s chip and what the card machine checks when you insert or tap it.
- Hex / binary
- Other ways of writing numbers. Binary uses only 0 and 1; hex uses 0–9 and A–F.
- Byte
- The basic unit of computer storage. One basic letter = 1 byte in UTF-8; ñ = 2 bytes; most emoji = 4 bytes.
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