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MAC Address Lookup & Generator

Find the vendor of a MAC address offline, convert formats and generate random MACs.

Free, no uploads, no sign-up. Runs 100% in your browser.

How MAC Address Lookup & Generator works

The IEEE vendor registry (oui-data, about 54,000 entries) is downloaded once and searched in your browser, including the longer MA-M and MA-S prefixes.

How to use MAC Address Lookup & Generator

1. Open MAC Address Lookup & Generator and paste or type your input.
2. Results update instantly as you type.
3. Tweak options such as format, indentation or algorithm.
4. Copy the output or download it as a file.

Tips

• Everything is computed locally. Safe for tokens, keys and private data.
• Use Ctrl/⌘ + K to jump between developer tools quickly.

MAC Address Lookup & Generator FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

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