Fydler UtilityBelt - MAC Address Generator

MAC Address Generator

Time & Networking Tool

Count

Separator

Case

Generated MAC Addresses

About MAC Addresses

A MAC (Media Access Control) address is a 48-bit unique identifier assigned to network interfaces. The first 24 bits (OUI) identify the manufacturer. Generated addresses use locally administered unicast addresses.

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lucide.createIcons(); const countInput = document.getElementById('mac-count'); const separatorSelect = document.getElementById('mac-separator'); const caseSelect = document.getElementById('mac-case'); const output = document.getElementById('mac-output'); function randByte() { return Math.floor(Math.random() * 256); } function formatMAC(bytes, sep, upper) { let s = bytes.map(b => b.toString(16).padStart(2, '0')).join(sep); return upper ? s.toUpperCase() : s; } function generate() { const count = parseInt(countInput.value) || 1; const sep = separatorSelect.value; const upper = caseSelect.value === 'upper'; const lines = []; for (let i = 0; i < Math.min(count, 100); i++) { const bytes = [randByte(), randByte(), randByte(), randByte(), randByte(), randByte()]; bytes[0] = (bytes[0] & 0xFE); // Unicast bytes[0] = (bytes[0] & 0xFD); // Not multicast, keep locally administered bit for realism lines.push(formatMAC(bytes, sep, upper)); } output.value = lines.join('\n'); } [countInput, separatorSelect, caseSelect].forEach(el => el.addEventListener('change', generate)); generate(); document.getElementById('mac-copy-btn').addEventListener('click', () => { const v = document.getElementById('mac-output').value; if (v) { navigator.clipboard.writeText(v); showToast('Copied MAC addresses!'); } }); function showToast(msg) { const toast = document.getElementById('toast'); const toastMsg = document.getElementById('toast-message'); toastMsg.textContent = msg; toast.classList.add('show'); setTimeout(() => toast.classList.remove('show'), 2000); }