XOR Key (hex or string)
e.g. 0x41, 0xFF, secret, AB
Input (plain text or hex bytes)
Binary ↔ Hex Cheat Sheet
0000 = 00100 = 41000 = 81100 = C
0001 = 10101 = 51001 = 91101 = D
0010 = 20110 = 61010 = A1110 = E
0011 = 30111 = 71011 = B1111 = F
Split byte into nibbles: 0111 0000 → 7 and 0 → 0x70
XOR rule: same bits = 0, different bits = 1. A XOR A = 0, A XOR 0 = A