MAC address formatter — normalize & OUI vendor lookup (local)
Paste a MAC address in any common format to normalize colon, hyphen, dot, and bare hex output, inspect OUI/NIC, multicast/local flags, and IEEE vendor name from an embedded OUI database.
Frequently asked questions
No. MAC parsing and IEEE OUI vendor lookup use a bundled database in this tab—no external API calls. Nothing is sent to LocalTools servers for processing.
Colon (`aa:bb:cc:dd:ee:ff`), hyphen, Cisco dot (`aabb.ccdd.eeff`), and bare hex. EUI-48 (12 hex digits) and EUI-64 (16 digits) are accepted.
Vendor names come from the IEEE OUI registry snapshot embedded in the page. Unregistered or private OUIs show as unknown.