MAC Address Formatter
Format MAC addresses as AA:BB:CC, AA-BB-CC or aabb.ccdd.eeff, one per line, and see the vendor from the IEEE list. Private.
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MAC addresses
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Free Online MAC Address Formatter
Paste MAC addresses in any style and get them in the style you need. The vendor is looked up offline from the public IEEE list. It gives developers a quick browser-based way to solve a focused mac address formatter task before moving the result into a project.
How to use MAC Address Formatter
Put one address per line. Pick a style, then press Format. Use "Make random addresses" to get locally administered test addresses.
Common mistakes
- Pasting an address with 11 or 13 digits: a MAC address has exactly 12 hex digits.
- Expecting a vendor for a random address: locally administered addresses have none.
Frequently asked questions
Where does the vendor name come from?
From the public IEEE Registration Authority list, bundled with this page and loaded only when you use it. Nothing is sent over the network.
What is a locally administered address?
The second bit of the first byte is set. It means the address was assigned by software (virtual machines, phones that randomise their address), not by a manufacturer.
Which style does Cisco use?
Cisco devices write three groups of four digits with dots: aabb.ccdd.eeff.
Is anything uploaded?
No. This tool runs in your browser and nothing you enter is sent to a server.
How do I use this mac address formatter tool?
Use the interactive controls above; processing stays in your browser and the result is intended as a practical starting point for development work.
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