Does my input leave the browser?

Processing and exports stay in this browser. Download JSON before closing a production log to keep editable work.

Yes. PDF reports accompany the editable text or data exports.

MAC Address Inspector & Formatter

Normalize MAC addresses, inspect local and multicast flags, and derive modified EUI-64.

Address

MAC Address

The lowest two bits of the first byte distinguish group delivery and local assignment. A randomized local address does not reliably identify a manufacturer.

IEEE address reference

Address Analysis

colon: 02:1A:2B:3C:4D:5E
hyphen: 02-1A-2B-3C-4D-5E
dotted: 021A.2B3C.4D5E
binary: 00000010 00011010 00101011 00111100 01001101 01011110
prefix: 02:1A:2B
assignment: Locally administered
delivery: Unicast
vendor: A vendor cannot be inferred reliably from a local or randomized address.
eui64: 00:1A:2B:FF:FE:3C:4D:5E

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What Is the MAC Address Inspector & Formatter?

Normalize MAC addresses, inspect local and multicast flags, and derive modified EUI-64.

How It Works

Paste a 48-bit address in colon, hyphen, dotted or compact HEX notation. Inspect its binary form, delivery type and assignment flags. Copy or export the result. Modified EUI-64 flips the local bit and inserts FF:FE; it does not predict your device’s actual IPv6 address. No vendor registry or network scan is included.

When to Use It

Network troubleshooting and documentation with explicit queries or local reference inspection.

Frequently Asked Questions

Does my input leave the browser?: Processing and exports stay in this browser. Download JSON before closing a production log to keep editable work.
Can I save a PDF?: Yes. PDF reports accompany the editable text or data exports.

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