NFC/RFID UID Generator

Generate random NFC/RFID UIDs in hex or decimal

56-BIT UID (7 BYTES)

NFC / RFID Chip Standard

Chip Type / Byte Length:

Output Representation Format:

Manual Hex Input (Optional):

Synthesized UID & Embedded Hooks

Serial Number (UID)

04:A2:3B:1F:89:0C:4E

// PN532 / MFRC522 Arduino C++ Hook
const uint8_t TARGET_UID[] = { 0x04, 0xA2, 0x3B, 0x1F, 0x89, 0x0C, 0x4E };
const uint8_t UID_LENGTH = 7;

bool isAuthorizedTag(uint8_t *uid, uint8_t length) {
  if (length != UID_LENGTH) return false;
  return memcmp(uid, TARGET_UID, UID_LENGTH) == 0;
}

// Web NFC API (Android Chrome)
async function scanNfcTag() {
  if (!('NDEFReader' in window)) return console.error('Web NFC unsupported');
  const ndef = new NDEFReader();
  await ndef.scan();
  ndef.onreading = (event) => {
    console.log('NFC Tag Scanned. Serial Number:', event.serialNumber);
  };
}