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MAC Address Generator

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Network & IP

MAC Address Generator

Generate random MAC addresses for testing and development.

Workspace

Run the tool here

Browser utility

Format

How many

Output

Run the workspace to see the response here.

How to use

Choose the separator and case.
Set how many addresses you need.
Copy them into your test configuration.

About this tool

Generate random MAC addresses in common formats for lab setups and documentation.

MAC Address Generator is part of the TmpMailer Network & IP set — free browser utilities that open instantly, need no account, and pair well with a temporary-email workflow when you just need a quick result.

Common use cases

Filling a network lab inventory.
Creating documentation examples.
Testing a parser that reads MAC addresses.

Common questions

Are these addresses safe to assign?

Use them only in isolated labs. On a real network, a duplicate MAC causes conflicts; follow your vendor's guidance.

What does the first byte indicate?

It encodes the unicast/multicast and globally/locally administered bits. Generated test addresses may use a locally administered prefix.

Can I generate a specific vendor prefix?

This tool produces random values. For OUI-specific addresses, generate the prefix separately and append random bytes.

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