Smart Card Engineering Tools

All tools run entirely in your browser. No data is uploaded.

Core Smart Card Tools

• APDU Status Word Lookup — Search SW1 SW2 codes (9000, 6A82, 61XX...)
• ATR Decoder — Parse Answer-To-Reset byte sequences
• GP Session Key Calculator — SCP02/SCP03 key derivation
• BER-TLV Parser — EMV/GP TLV data parsing
• EMV Tag Lookup — Complete EMV tag list

Algorithm & Crypto Tools

• CRC Calculator — CRC-16/32, multiple algorithms
• Luhn Algorithm — Credit card/ICCID/IMEI check digits
• Hash Digest — MD5, SHA1, SHA256, SHA512, SM3
• Base64 Encoder/Decoder — Text and binary
• AES / SM4 Encryption — AES-256-CBC + SM4-CBC
• RSA Asymmetric — Key pair generation, sign/verify
• SM2 Chinese Crypto — ECC key gen, sign, verify
• ASN.1 DER Parser — Tree-structured ASN.1 decoding
• X.509 Cert Parser — PEM/DER certificate parser