Random MAC Address Generator

A MAC address is a 48-bit hardware identifier for a network interface, written as six pairs of hex digits like 02:11:22:ff:80:ab. It identifies a device on a local Ethernet or Wi-Fi segment, separate from the IP address that routes traffic between networks.

Bit 1 of the very first octet is the locally administered flag. When set, it declares that the address was assigned by software or an administrator rather than burned in by a manufacturer. The tool sets this bit by default so generated addresses cannot collide with a real vendor prefix.

The two low bits of the first octet are reserved for flags, so the second hex digit is constrained. With locally administered on and multicast off it is 2, 6, a or e; turn multicast on and it becomes 3, 7, b or f. The other five octets are fully random.

Bit 0 of the first octet is the multicast or group bit. When it is set the frame is meant for a group of receivers rather than one. Leave it off for a normal unicast address, which is what a single network card uses.

No. They are random, so a repeat is extremely unlikely across a small batch but never impossible. Treat them as throwaway values for testing and mock data, not as permanent identifiers you register to hardware.

You can generate 1 to 100 addresses per click. Each row has its own copy button, and Copy all puts the entire list on your clipboard as newline-separated lines, ready to paste into a spreadsheet or config file.

It is cosmetic and depends on where the value goes. Linux and macOS tools usually show colons, while Windows and some vendor consoles show hyphens. Both forms describe the same six octets and are widely accepted.

This tool only produces values; it does not change any network adapter. Setting a locally administered address is a legitimate privacy and testing technique, but do it through your operating system settings and follow your own network policy.

No. Generation runs entirely in your browser using the built-in random source, so nothing is uploaded or logged. You can even disconnect from the network and it still works.