HEX ↔ Byte-Array
Paste hex in any reasonable form (0x90, 0x00, 9000, 90:00, \\x90\\x00). Get back the same bytes formatted for C, Java, Python, JavaScript, escape-string, or canonical hex with your choice of separator.
Input
Result
Type something to convert.
All conversion runs locally.
About this tool
Logs from PC/SC, Wireshark, gpshell, OpenSC, etc. all use slightly different hex formats. This tool normalises and re-emits in the format your code expects.