Generate random MAC addresses in a valid format for testing and lab work. A MAC address is the hardware identifier on a network interface, written as six pairs of hexadecimal digits, and you often need realistic-looking ones when writing tests, populating a network simulation, or seeding a database without using real device addresses. This generator produces properly formatted addresses and lets you choose the separator (colon or hyphen) and whether the letters are uppercase or lowercase to match your environment. Generate a single address or a batch, and copy the whole list with one click. Everything runs locally in your browser, so these test values are created instantly on your device with nothing sent to any server.