MAC Address Formatter

Reformat MAC addresses in any notation

A MAC address is a 48-bit hardware identifier made of twelve hexadecimal digits, but different systems write it in different ways. Windows and many tools use hyphens, Unix and web interfaces use colons, Cisco equipment uses three groups separated by dots, and some contexts use no separators at all. This formatter accepts a MAC address in any of these styles, strips out whatever separators and spaces it contains, and re-emits it in the format and letter case you choose.

It also shows every common format at once, so you can copy whichever one your current task needs without converting by hand.

Why MAC formatting matters

Pasting a MAC address into a system that expects a particular separator is a common source of errors. Network administrators moving addresses between a switch, a firewall and a spreadsheet often need to switch notation, and automation scripts usually require one exact form. Normalising the format avoids rejected entries and mismatched comparisons.

The tool validates that the input contains exactly twelve hexadecimal digits, so malformed addresses are caught immediately. All conversion happens locally in your browser, so hardware identifiers are never uploaded.

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