The chip keeps the count
NTAG21x chips - the NTAG213, NTAG215 and NTAG216 used in most NFC stickers - have a counter built into the hardware. Every read ticks it up by one, with no app and no server in the loop.
NFC Tap Counter
An NFC tag can count its own scans - the number lives in the chip, not on a server. Write a tag that points to this page, give it a tap, and the live count and tag ID show up in the card.
Tag scanned
0
scans counted by the tag
Tag ID
Live demo
Tap an NFC tag that points here and its scan count appears in this card.
Point your tag at
https://nfc.cool/tap-counter/
How It Works
The URL carries it
NFC.cool Tools embeds placeholder bytes when it writes the tag. On every scan the chip swaps them for the live values and appends them as ?nfc= - the tag ID first, then the count.
This page just reads it
No backend, no database. This page decodes the ?nfc= value straight out of its own address bar and shows you what the chip handed over. The counting already happened.
What You Can Do With a Self-Counting Tag
Tell tags apart
Put the same URL on fifty stickers and the tag ID still tells you which physical one was tapped. One link to manage, fifty tags you can identify.
Limit free access
The count travels with every tap, so you can act on it - give the first hundred scans a reward and redirect the rest somewhere else.
Track engagement
Stick a tag on a card, a poster or a product box and the counter becomes a quiet engagement metric - no analytics pipeline required.
Prove authenticity
The counter only ever goes up and cannot be wound back, which makes it hard to fake - useful for limited editions and anti-counterfeit checks.
Want the Full Story?
There is more to the NFC Tap Counter - which chips work, the real-world use cases, and the full step-by-step setup.