MAC Address Generator
Generate locally administered unicast MAC addresses in common formats for network and software testing.
WebFreeLocal
Runs locally in your browser.
Generated MAC addresses
Choose a format and generate MAC addresses for testing.
Key benefits
Everyday uses for MAC Address Generator
Unique values within each batch
Optional three-byte local prefix and text or JSON export
A focused task
Use the output as sample identifiers in controlled network configuration, parsers, UI previews, and automated tests.
What is this tool?
Create random MAC address test data in your browser. Select a format and letter case, generate up to 500 unique values, then copy or download the results.
How to use it
Open the tool using the button above. All input and processing take place on the independent tool website.
Choose the MAC address format and letter case.
Set a quantity from 1 to 500; optionally provide a locally administered three-byte prefix.
Generate, copy, or download the addresses as text or JSON.
Check the result before downloading, copying or publishing it. Keep your original data.
Processing and supported inputs
How it works
The browser uses cryptographic random bytes, sets the local and unicast bits when no prefix is provided, removes duplicates within the batch, and formats the six bytes for display. Generation and export happen locally in your browser.
Formats & compatibility
Colon, hyphen, Cisco dotted, and plain hexadecimal formats; uppercase or lowercase; 1–500 addresses per batch; optional local prefix; text and JSON export.
Privacy and file processing
MAC addresses are generated in your browser and are not sent to the BytHut server.
PrivacyFree · Generated addresses are test data, not assigned vendor OUIs or a guarantee of network-wide uniqueness. Do not use them to impersonate a device.
Frequently Asked Questions
Are these MAC addresses vendor-assigned?
No. By default the first byte marks each address as locally administered and unicast. An optional prefix must follow the same rule.
Can two batches contain the same address?
Yes. Values are unique within one batch, but separate batches are not compared with each other.
Continue to the tool
Open MAC Address Generator to get started.