EMV TLV Parser
Parse and decode BER-TLV (Basic Encoding Rules - Tag Length Value) data structures used in EMV payment applications.
⚠️ For testing and educational use only. Do not use real cardholder data.
Note: All parsing is performed client-side in your browser. Your data is never sent to a server.
About TLV Data Structures
TLV (Tag-Length-Value) is a data encoding format used extensively in EMV chip card specifications. It provides a flexible way to encode data elements where:
- Tag: Identifies the type of data (1-3 bytes)
- Length: Specifies the length of the value field (1-3 bytes)
- Value: Contains the actual data
BER-TLV (Basic Encoding Rules TLV) is the specific TLV format used in EMV, following the ASN.1 BER encoding rules.
Key Features of EMV TLV:
- Tags can be primitive (containing data) or constructed (containing nested TLV objects)
- Tags are typically represented in hexadecimal format
- EMV defines standard tags for payment-related data elements
- Supports hierarchical data structures through nesting
- Used in card-to-terminal communication, cryptogram generation, and transaction processing
Common EMV Tags:
- 5A: PAN (Primary Account Number)
- 5F24: Expiration Date
- 9F02: Amount, Authorized
- 9F03: Amount, Other
- 9F26: Application Cryptogram
- 82: Application Interchange Profile
- 95: Terminal Verification Results
- 9F10: Issuer Application Data
EMV Decoder tools perform all calculations client-side for maximum security.
No sensitive data is ever transmitted to our servers.