MAC Address ジェネレーター
「MAC Address ジェネレーター」はコード、データと QRに使えるブラウザツールです。入力内容と結果は通常この端末内で処理され、登録は必要ありません。
使い方
使い方
- Choose a MAC address format and how many addresses to generate.
- Enable locally administered addresses when the values are for private or virtual network use.
- Generate the addresses, then copy or download the newline-separated result.
Choose a common MAC notation
Colon format uses six pairs such as 02:7A:4C:91:3E:B8. Hyphen format uses the same bytes with hyphens, while Cisco dot format groups the address into three four-hex-digit blocks.
Local and private generation
Generation runs in your browser with crypto.getRandomValues. The multicast bit is cleared so the result is an individual address; the local-admin option sets the locally administered bit for private, virtual, or lab use.
よくある質問
あわせて知りたいこと
Are these real hardware addresses?
No. They are random values for testing, documentation, virtualization, and other development uses. Check your network policy before assigning one to a device.
What does locally administered mean?
It sets the second least-significant bit of the first byte, indicating that the address is assigned locally rather than being a globally registered vendor address.
Are generated values unique?
The generator keeps values unique within each result. It cannot guarantee that a value is unused elsewhere on your network.
Does the address leave my browser?
No. Randomness, formatting, copying, and downloading happen locally in your browser.