APDU Command Builder
Construct valid ISO 7816-4 APDU commands by selecting command type and parameters.
类
指令
参数1
参数2
Lc根据数据长度自动计算
预期响应长度（无则留空）
| CLA | ||
| INS | ||
| P1 | ||
| P2 | ||
| Lc | ||
| 数据 | ||
| Le |
ISO 7816-4指令参考
| INS | 命令 |
|---|---|
| A4 | SELECT |
| B0 | READ BINARY |
| D6 | UPDATE BINARY |
| B2 | READ RECORD |
| C0 | GET RESPONSE |
| CA | GET DATA |
| 20 | VERIFY |
| 88 | INTERNAL AUTHENTICATE |
| 82 | EXTERNAL AUTHENTICATE |
| 84 | GET CHALLENGE |
常见问题
Yes, all tools on SmartCardFYI are completely free with no account required. Tools run entirely in your browser (client-side JavaScript) and do not send your data to any server, ensuring privacy for sensitive information like APDU commands, ATR strings, or AID bytes.