MAC Address Formatter
Bulk-convert MAC addresses between colon, hyphen, Cisco dot and no-separator formats.
Every device expects a different format
Windows shows MAC addresses with hyphens (AA-BB-CC-DD-EE-FF), Linux and macOS with colons (aa:bb:cc:dd:ee:ff), Cisco gear in dotted triplets (aabb.ccdd.eeff), and some systems want no separators at all. The MAC Address Formatter converts addresses to the format you need in bulk.
Features
- One MAC address per line, in any format
- Detection of invalid addresses
- Upper or lower case
- Unicast/multicast and globally unique/locally administered labels
Use cases
Prevents format errors in DHCP reservations, MAC filtering, inventory lists, switch port security and network monitoring imports.
How to use MAC Address Formatter
- Paste MAC addresses, one per line.
- Choose the target format and letter case.
- Review the validation results and labels.
- Copy the formatted list.
Why use this tool?
Saves network admins from editing hundreds of addresses by hand.
FAQ
What does 'locally administered' mean?
The second-least significant bit of the first byte is 1, meaning the address was assigned by software (virtual machines, randomised Wi-Fi MACs) rather than the manufacturer.
Can I find the manufacturer from a MAC?
The first three bytes (OUI) identify the vendor, but this tool doesn't look up a vendor database.
Why does my phone's MAC address change?
Modern phones use random, locally administered MAC addresses on each Wi-Fi network for privacy.
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