NFC tag types and standards
Near Field Communication covers a small family of tag types defined by the NFC Forum, each layered on an existing ISO/IEC contactless standard. This reference lists Types 1 through 5 with their protocol basis, memory range, data rate, and typical uses, plus the three NFC operating modes that govern how a device interacts with tags and cards.
The five NFC Forum tag types at a glance
| Type | Underlying standard | Memory | Typical speed | Common chips / uses |
|---|---|---|---|---|
| Type 1 | ISO/IEC 14443 Type A | 96 bytes–2 KB | 106 kbit/s | Topaz — simple, low-cost tags; largely superseded |
| Type 2 | ISO/IEC 14443 Type A | 48 bytes–2 KB | 106 kbit/s | NTAG213/215/216 — consumer stickers, URL tags |
| Type 3 | FeliCa (JIS X 6319-4) | Variable, up to ~1 MB | 212/424 kbit/s | Sony FeliCa — transit cards (Suica, Octopus) |
| Type 4 | ISO/IEC 14443 Type A/B | Up to 32 KB | 106–424 kbit/s | MIFARE DESFire — access control, e-passports, payment |
| Type 5 | ISO/IEC 15693 | Variable | 26.48 kbit/s | Inventory, library RFID — up to ~1 m read range |
How the radio layer works
All NFC operates on 13.56 MHz and powers passive tags by magnetic induction — the reader’s alternating field induces a current in the tag’s antenna coil, giving it just enough power to respond. This is why NFC tags work without a battery. The coupling is deliberate kept weak, limiting proximity NFC to roughly 4 centimetres for ISO 14443 types. ISO 15693 (Type 5) uses a stronger field and broader coupling geometry, extending range to about 1 metre at the cost of lower data rate.
The three NFC operating modes
Reader/Writer mode — the device (smartphone, terminal) reads or writes a passive NFC tag. This is how phones tap to URLs on a poster tag or write a contact card to a blank sticker.
Card Emulation mode — the device impersonates a contactless smart card. This is how Apple Pay, Google Pay, and transit cards work — the phone acts like a payment card when held near a terminal, with a secure element or HCE (Host Card Emulation) handling the cryptographic credentials.
Peer-to-Peer mode — two NFC-capable devices exchange data directly. This was used for Android Beam, but the mode is now largely deprecated in favour of Bluetooth or Wi-Fi for file transfer.
NDEF: the data format on tags
All tag types support NDEF (NFC Data Exchange Format) — a compact binary format that wraps records such as a URL (U record type), plain text (T), a vCard, or an Android Application Record. Any compliant reader, including any modern smartphone, can parse NDEF without knowing the specific tag chip. Writing a URL to an NTAG213, for example, means writing an NDEF message containing a single U record with the URL.
Choosing the right tag type
- Consumer stickers and smart posters: Type 2 (NTAG213 for small payloads, NTAG215/216 for more data like vCards or long URLs) — cheap, widely compatible, and enough memory for almost any everyday use case.
- Transit and high-speed reading: Type 3 (FeliCa) if targeting East Asian transit systems; otherwise Type 4.
- Access control, e-passports, high security: Type 4 (DESFire) — supports AES encryption, mutual authentication, and large data storage.
- Inventory and warehouse: Type 5 (ISO 15693) — longer read range so handheld readers can scan items without precise alignment.