What is NFC?

A plain-English introduction to Near Field Communication — the tap-to-connect technology behind contactless cards, transit passes, and many QrioTag products.

NFC stands for Near Field Communication. It lets two devices — or a device and a small sticker — exchange data simply by being held close together. It is the technology behind tap-to-pay, transit cards, and the NFC-enabled QrioTag stickers, cards, and bands.

In 30 seconds

NFC is a short-range wireless technology — about 4 cm (1.5 inches). It powers tap-to-pay, transit cards, and small passive tags you can tap with a phone to open a link. A passive NFC tag needs no battery — it draws its tiny power requirement from the phone's field.

The NFC Forum's official 80-second introduction to Near Field Communication.

The basics

NFC is a standardised radio technology that operates at 13.56 MHz over a very short range — typically less than 4 centimetres. Its short range is a safety feature: it is nearly impossible to accidentally read an NFC tag from across a room.

NFC grew out of RFID (radio-frequency identification), but it is designed specifically for two-way, device-to-device interactions. Phones, payment terminals, and transit gates all speak the same NFC protocol, which is why tap-to-pay "just works" across devices.

Active vs passive NFC

Active NFC

Devices with their own power — your phone, a payment terminal, a transit reader. They generate a radio field and can initiate a conversation.

Passive NFC

Tiny chips with no battery — like the sticker inside a QrioTag NFC product. They draw the power they need from the active device's field, just long enough to send back their stored data.

This is why a passive NFC sticker can sit on your bag for years and still work the moment someone taps their phone to it.

Where you see NFC today

Tap-to-pay with your phone or contactless card
Transit cards on buses, subways, and trains
Hotel key cards and office access badges
Electric-vehicle charging authentication
Smart posters, product tags, and recovery tags

NFC vs QR — when to use which

QR codes and NFC solve the same problem (connecting a physical object to digital information) but in different ways.

	QR code	NFC
How you use it	Point camera, tap link	Tap phone to tag
Range	A foot or two away	About 4 cm (1.5 in)
Works without good lighting?	No	Yes
Visible on the object?	Yes	No (embedded)
Works on every phone?	Any camera phone	iPhone 7+ and modern Android
Feels like	Scanning	Touching

That is why many QrioTag products include both. The QR code gives you universal compatibility (it works on any phone with a camera), and NFC gives you a premium, tap-to-connect experience.

If you are new to QR codes too, read What is a QR code? alongside this page.

How QrioTag uses NFC

Our NFC-enabled products — including stickers, cards, and wristbands — embed a passive NFC chip that stores the same secure, encrypted identifier as the QR code printed on the tag.

A finder holds their phone near the tag

On iPhone (7 and newer) or modern Android, the phone detects the tag within a few centimetres.

The phone opens the scan page

A web page opens automatically — the same page you would see from scanning the QR code. No app needed.

The owner is notified

Exactly like a QR scan, the owner receives an instant notification and the finder can send an anonymous message.

The NFC chip does not leak your personal info

Just like the QR code, the NFC chip stores an encrypted identifier, not your personal information. Only the QrioTag server can decrypt it. A thief with an NFC reader learns nothing useful by tapping your tag.

For how the scan flow works end-to-end, see What happens when someone scans your tag.

Learn more

NFC Forum — What NFC does — the official industry body explaining everyday NFC use cases.
Wikipedia — Near-field communication — technical reference covering protocols, history, and standards.