How Does an NFC Tag Work?
An NFC tag works through inductive coupling at 13.56MHz. When you hold an NFC-enabled phone within about 10cm of the tag, the phone's antenna creates an electromagnetic field that powers the tag's chip - no battery required. The powered chip then sends back its stored data (a URL, contact or command), which the phone reads and acts on instantly.
Why Choose IDrfid
Inductive Coupling
The phone's field induces power in the tag's antenna to wake the chip.
Short Range ~10cm
NFC's ~10cm range makes it secure and intentional - taps are deliberate.
Two-Way Data
NFC tags can be read and written, enabling dynamic, updatable content.
Instant Action
One tap opens URLs, launches apps, shares data or completes payments.
Technical Specifications
| Frequency | 13.56MHz (HF) |
| Protocol | NFC Forum Type 2/5, ISO14443A |
| Power | Passive (phone-powered) |
| Read Range | ~10cm |
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Frequently Asked Questions
Does an NFC tag need power?
No, NFC tags are passive - they harvest energy from the reader phone's electromagnetic field, so no battery is ever needed.
How far can an NFC tag work?
NFC tags work within about 10cm, a short range that keeps interactions deliberate and secure.
Can NFC tags be rewritten?
Yes, most NTAG213/215/216 tags are rewritable, letting you update the stored URL or content as needed.
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