MAC address inspector

Normalize a MAC and inspect its address bits.

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MAC address inspector processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

Copy link includes the inputs you choose to share in the address. Anyone with that link can reopen them. Files and generated results are excluded. Password and key tools share settings only.

Your input

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Your result

Reset reloads the tool with its starting values and releases open files and device controls. Saved drafts stay on this device until you delete them.

Links include your inputs and settings. Anyone with the link can see them, so leave out private text. Files and generated results are left out; random draws run again.

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Updated 2026-09-20

MAC address inspector explained

Normalize a 48-bit MAC address and inspect its group and locally administered bits. The tool accepts colon, hyphen, Cisco dotted and compact forms without contacting an address database.

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A worked example

02:1a:2b:3c:4d:5e is locally administered and unicast because of the low bits in its first byte. Normalization changes letter case and separators only.

Before you use the result

Does not identify a device, vendor or owner. Randomized addresses and spoofing limit what any MAC address can establish. EUI-64 values are not accepted.

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ToolOctopus. “MAC address inspector.” Updated 2026-09-20. https://tooloctopus.com/mac-address-inspector.

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