Generates random MAC addresses, one per line. Choose the separator (colon like 00:1A:2B, hyphen like 00-1A-2B, or none), pick uppercase or lowercase hex, and set how many to generate at once. Handy for testing, mock data, DHCP reservations and network labs.
Enable "Locally administered" to set the local bit (second-least-significant bit of the first octet) and clear the multicast bit, marking the address as locally assigned rather than a real vendor OUI. Everything runs locally in your browser.