Are the generated MAC addresses real or unique?

They are randomly generated for testing, development and education. Do not use them in production where uniqueness or compliance is required.

Can I set a vendor or OUI prefix?

Yes. Enter a valid prefix (with or without separators). The tool keeps your prefix and randomizes the remaining bytes.

Is the generator free and private?

Yes. It runs client-side in your browser, is free to use and supports one-click copy.

Free OnlineMAC Address Generator

Q: Which format should I choose?

Colon (Linux/Unix), Hyphen (Windows), Period/Cisco (001A.2B3C.4D5E), or Plain (001A2B3C4D5E) for databases and code.

Generate Random MAC Addresses for VM, Network Testing & Development

Create valid MAC addresses instantly with multiple formats (colon, hyphen, period, raw). Support custom prefixes and one-click copy.

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Batch Generation

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One-Click Copy

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Export CSV/JSON

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Custom Prefix

🔧 Configuration Center

Customize your MAC address format, case, and optional vendor prefix with our advanced configuration options.

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How to Use Examples About MAC FAQ

Why this MAC address generator?

Built for virtualization, network simulation and software testing. Multiple output styles, optional OUI prefix, and instant copy make it a dependable random MAC address maker for daily use.

How to Use

Quick start

Choose a format: colon, hyphen, period (Cisco) or raw.
Select uppercase or lowercase.
Optionally enter an OUI/vendor prefix.
Click Generate and copy the result.

Advanced tips

Prefix/OUI: Use a vendor prefix to test vendor-specific logic.
Raw format: Best for code, DB seeds and fixtures.
Case: Use lowercase for Linux tooling that prefers it.
Privacy: Generation is client-side; nothing is sent to a server.

Format Examples

Common outputs

Colon: 00:1A:2B:3C:4D:5E
Hyphen: 00-1A-2B-3C-4D-5E
Period (Cisco): 001A.2B3C.4D5E
Raw: 001A2B3C4D5E

With OUI prefix

Prefix 00:1A:2B → 00:1A:2B:AA:BB:CC
Prefix 001A2B → 001A2B11FF22

About MAC Addresses

What is a MAC address?

A MAC (Media Access Control) address is a 48-bit identifier for network interfaces, written as 12 hexadecimal digits. It’s essential for local network communication at the data-link layer.

The first 3 bytes usually represent the vendor (OUI), and the last 3 bytes identify the device. This tool outputs correctly formatted, standards-compliant addresses for testing.

Glossary

OUI: Organizationally Unique Identifier (vendor prefix).
LAA/UAA: Locally vs. Universally Administered Addresses.
Formats: colon, hyphen, period/Cisco, raw.

Frequently Asked Questions

Are the generated MAC addresses real?

They are random and not tied to hardware. Use for tests only, not for production.

How does the OUI/prefix work?

Enter a valid prefix; the tool preserves it and randomizes the remaining bytes.

Which format should I choose?

Colon — Linux/Unix
Hyphen — Windows
Period/Cisco — Cisco devices
Raw — Databases, code

Is it free and private?

Yes. It runs in your browser (client-side), is free, and supports one-click copy.