APDU Command Builder & Parser

Interactive ISO 7816-4 APDU command construction and parsing. Build Case 1/2/3/4 APDUs with precise byte control, or parse raw APDU hex. Supports Extended APDU (3-byte Lc/Le), instant SW1 SW2 lookup, and common command presets for Java Card, GlobalPlatform, and EMV development.

APDU Parameters

CLA INS P1 P2

Has Lc (Command Data) Has Le (Expected Response Length) Extended APDU

Command Data (hex)

Le (0x00 = max, 0x0000 in extended)

Assembled APDU

APDU Length: - bytes | Case: -

Command	APDU	Description
SELECT (by AID)	`00 A4 04 00 07 A0 00 00 00 04 10 10 00`	Select application by AID
SELECT (by DF name, P1=04)	`00 A4 04 00 08 A0 00 00 00 03 00 00 00 00`	Select by Dedicated File name
READ BINARY	`00 B0 00 00 00`	Read binary data (Case 2, SFI offset)
UPDATE BINARY	`00 D6 00 00 04 DE AD BE EF`	Update binary data (Case 3)
GET CHALLENGE	`00 84 00 00 08`	Get random challenge (8 bytes)
VERIFY (PIN)	`00 20 00 01 04 31 32 33 34`	Verify PIN "1234" (P2=01 global PIN)
INTERNAL AUTHENTICATE	`00 88 00 00 08 11 22 33 44 55 66 77 88`	Internal authenticate with challenge
GET DATA	`80 CA 00 65 00`	Get data object (Case 2)

Command	APDU	Description
INITIALIZE UPDATE	`80 50 00 00 08 00 00 00 00 00 00 00 00`	Initiate Secure Channel
EXTERNAL AUTHENTICATE	`84 82 03 00 10 HMAC_DATA...`	External authenticate (SCP02)
INSTALL (for load)	`80 E6 02 00 10 DATA...`	Install for load (CAP file)
DELETE	`80 E4 00 00 09 4F 07 A0 00 00 00 04 10 10`	Delete application
GET STATUS	`80 F2 80 00 02 4F 00`	Get card status (ISD)
STORE DATA	`80 E2 00 00 04 01 02 03 04`	Store data on card

Command	APDU	Description
GET PROCESSING OPTIONS	`80 A8 00 00 02 83 00 00`	Initiate EMV transaction (GPO)
READ RECORD	`00 B2 01 14 00`	Read record SFI=1, Rec=1
GENERATE AC	`80 AE 80 00 1D DATA...`	Generate Application Cryptogram (ARQC)

APDU Command Builder & Parser

APDU Parameters

Assembled APDU

Raw APDU Hex Input

Parsed Result

Common APDU Commands

ISO 7816-4 Interindustry Commands

GlobalPlatform Commands

EMV Payment System Commands