What is a MAC address?

A MAC address is a 48-bit hardware identifier assigned to a network interface. The same address can be written in different styles, such as colon-separated, hyphen-separated, Cisco dotted, or compact notation.

The underlying value does not change when the formatting changes. Only the delimiters and casing do.

Tool description

This tool normalizes a MAC address and converts it into several common display formats. It supports upper-case and lower-case output and shows the result in all supported styles at once.

It is useful when you need to move between vendor documentation, networking tools, and configuration examples that all prefer different notation.

Examples

  • 00:1A:2B:3C:4D:5E
  • 00-1A-2B-3C-4D-5E
  • 001A.2B3C.4D5E

Features

  • Format detection across multiple input styles
  • Case toggle for output normalization
  • Copyable results for all supported representations

Limitations

The tool accepts only exact 6-byte MAC addresses in the supported formats.

It does not handle EUI-64 addresses, and malformed separators are rejected rather than repaired.