~/tools / mac-formatter
// networking

MAC Address Formatter

Paste MAC addresses in any format, one per line or straight out of a show mac address-table. Pick the output format and copy the clean list.

● runs 100% in your browser — nothing is uploaded

Result

MAC address formats by vendor

  • Colon 00:1a:2b:3c:4d:5e — Linux, macOS, FortiOS, most RFCs
  • Hyphen 00-1A-2B-3C-4D-5E — Windows (ipconfig /all, getmac)
  • Cisco dotted 001a.2b3c.4d5e — Cisco IOS / NX-OS MAC tables and ACLs
  • HPE / Aruba 001a2b-3c4d5e — ProCurve / ArubaOS-Switch

What the type details mean

The least significant bit of the first byte marks a multicast (group) address; the second bit marks a locally administered address — typical of randomized Wi-Fi MACs on phones and of virtual machines. The first three bytes of a universally administered address are the vendor OUI.