The Media Access Control (MAC) address is used for device identification and authentication. Sometimes, the MAC address can be used for tracking. Technitium MAC Address Change is a freeware tool that allows you to change (spoof) MAC Address of your Network Interface Card (NIC) instantly. It hides user’s MAC address through the generation of valid random MAC addresses. It works on Windows 10, 8 & 7 for both 32-bit and 64-bit.