Most NFC tags ship blank, and most buyers discover too late that writing data to 10,000 tags by hand is a weekend-destroying project. Pre-encoding solves this β the factory writes your data during production, and tags arrive ready to deploy.
What Can Be Pre-Written
| Data Type | What It Does | Common Use Case |
|---|---|---|
| URL | Opens a web page on tap | Product info, menus, warranty registration |
| vCard | Saves contact info to phone | Business cards, networking tags |
| WiFi credentials | Connects to network on tap (Android) | Guest WiFi, office access |
| Plain text | Displays a message | Asset labels, serial numbers |
| Custom NDEF | App-specific records | Custom applications, IoT triggers |
| UID-based rules | Uses the chip's factory-unique ID | Anti-counterfeiting, database lookup |
Why Pre-Encode Instead of DIY
- Time: 10,000 tags Γ 3 seconds each = 8+ hours of manual tapping
- Consistency: no encoding errors from fatigue or app glitches
- Verification: every tag read-back-verified during the encoding process
- Locking: we can lock tags read-only after encoding, preventing field tampering
How to Order Pre-encoded Tags
The simplest approach for URLs and simple data: send us the payload (the URL, the vCard file, or the WiFi credentials), and we handle the encoding format. For variable data (unique URL per tag, serial-numbered entries), send a spreadsheet or API rule β each tag gets its own data, matched to its printed serial number if you've ordered custom printing.
UID-Based Encoding β The Anti-Counterfeit Option
Every NFC chip has a factory-programmed unique identifier (UID) that cannot be changed. If your application verifies tags against a database using the UID, counterfeiting becomes effectively impossible β a fake tag can copy the visible data but not the chip's internal UID. This is how our fuel-voucher anti-counterfeiting projects work, and the same architecture applies to luxury goods, pharmaceuticals, and warranty verification.
Need NFC / RFID tags for your project?
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