MAC Address Generator — Free Online Tool
Generate random MAC addresses with custom format and case.
About MAC Address Generator
The MAC Address Generator creates random, validly-formatted MAC addresses for testing, lab work, documentation, and placeholders. You control the separator, the letter case, and how many addresses to generate at once.
Generated addresses are marked as locally administered (not tied to a real manufacturer), and everything runs in your browser so it's instant and private.
How to Use MAC Address Generator
- Choose a separator and case.
- Set how many addresses you want.
- Click Generate.
- Copy the addresses from the result box.
Key Features
Random, well-formatted MAC addresses
Separator options: colon, hyphen, dot, none
Upper or lower case output
Generate up to 100 at once
Locally-administered bit set
100% client-side and private
Frequently Asked Questions
What is a MAC address?
A MAC (Media Access Control) address is a 48-bit hardware identifier for a network interface, usually written as six pairs of hex digits, e.g. 00:1A:2B:3C:4D:5E.
What do the format options do?
You can choose the separator (colon, hyphen, dot, or none) and upper or lower case, and generate one or many addresses at once.
Are these real device addresses?
No. They are randomly generated for testing, labelling, or placeholders. The second-least-significant bit of the first octet is set so they are flagged as locally administered.
Is anything sent to a server?
No. Generation happens entirely in your browser, so nothing leaves your device.