Test MAC Address Generator — Dummy MACs for Fixtures

Generate synthetic MAC / EUI-48 strings for databases, log fixtures, and parser QA — locally administered unicast by default, optional invalid corpus. Not a vendor lookup, not a converter, not a NIC spoofer.

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Test MACs — developer notes
Locally administered dummy EUI-48 strings for fixtures and parser QA. Default pool sets the U/L bit. Not a vendor lookup, not a NIC spoofer, not a scanner.

How generation works

Pick a quantity (1–100), kind, validity, format, letter case, and order. Changing an option refreshes the list immediately. Copy all or download JSON, CSV, SQL, or TXT.

Options

Quantity (1–100)
How many MAC strings to emit for seed jobs. Capped at 100.
Kind
Locally administered unicast by default, plus RFC 9542 documentation, LAA multicast, broadcast, or a custom 1–5 octet prefix you own. No vendor OUI dropdown.
Validity
Valid rows stay inside the selected pool. Invalid mode reveals malformed corpus kinds for negative parser tests only.
Format
Colon (Linux), hyphen (Windows), Cisco dotted, plain 12 hex digits, or modified EUI-64 (colon-8 with FF:FE and U/L invert).
Letter case
Lowercase hex (default) or uppercase. Parsers that compare strings can be case-sensitive.
Order
Random with replacement, unique without replacement, or sequential walk. Tiny pools (broadcast; documentation at count>256) error when quantity exceeds the pool.

Examples

Default locally administered unicast

Settings

kind=locallyAdministered, validity=valid, format=colon

Sample output

02:00:5e:11:22:33

Invalid too-short token

Settings

validity=invalid, invalidKind=tooShort

Sample output

02:00:00:00:00

Related tools

Need IP fixtures or a JSON table? Try the test IP address generator and JSON test data generator.

Test MAC FAQ

Fixtures, locally administered bits, and what this tool is not

Why locally administered by default?

Setting the U/L bit marks the address as software-assigned so dummy fixtures cannot claim an IEEE vendor OUI. Prefer this for databases, VMs, and parser tests.

I searched for a random mac generator. Is this it?

If you need dummy MAC strings for fixtures and parser QA, yes. We do not mint vendor-looking OUIs or change your network adapter.

I searched for a fake mac generator. Is this it?

Yes for synthetic fixture strings. No for impersonating Apple/Cisco hardware — this is not a mac lookup and does not identify manufacturers.

Is this a MAC lookup or OUI vendor tool?

No. It generates strings locally. It does not resolve manufacturers, geolocate devices, or scan a network.

Can I use this for MAC spoofing?

No. This page only mints fixture strings. It is not a NIC-spoofing guide and must not be used for unauthorized network access.

Test Data

Synthetic field values for fixtures and DB seed — reserved-range phone numbers first.

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