Reformats a MAC address (colon, hyphen, dot).
The MAC Address Formatter reformats an Ethernet MAC address into the separator style you need: colon (aa:bb:cc:dd:ee:ff), hyphen (aa-bb-cc-dd-ee-ff), Cisco-style dot (aabb.ccdd.eeff), or no separator at all. It strips any existing separators and lets you choose lowercase or uppercase output, which is handy when network gear, config files, and APIs each expect a different MAC address format.
No. The formatter runs entirely in your browser and nothing is uploaded. The MAC address you paste never leaves your device.
Any input is accepted as long as it contains exactly 12 hexadecimal digits (0-9, a-f). All other characters such as colons, hyphens, dots, and spaces are ignored, so you can paste a MAC in nearly any common notation.
It outputs colon (aa:bb:cc:dd:ee:ff), hyphen (aa-bb-cc-dd-ee-ff), dot in groups of four (aabb.ccdd.eeff), or none (12 plain hex digits).
The tool requires exactly 12 hex digits after removing all non-hex characters. If you have too few or too many digits, or stray characters that aren't valid hex, the count won't match and you'll see this error.
Yes. A case option lets you output the MAC address in lowercase or uppercase; the default is lowercase.