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NFC tags store data in the standardized NDEF (NFC Data Exchange Format). This tool builds a correctly-structured NDEF record preview for common record types (plain text, a URI, or Wi-Fi credentials) — it formats the data structure only; it does not write to physical NFC hardware, since a browser can't access an NFC writer directly.
How it works
Pick a record type and fill in its fields; the tool assembles the record according to the NDEF specification's type/length/value structure and shows a formatted preview of the resulting record.
- Enter record type.
- Enter content (text or URL).
- Enter language code (text records only).
- Click Calculate to see your results.
Examples
A URI record
Choosing the URI record type and entering a web address produces a properly-structured NDEF URI record preview, ready to be written using dedicated NFC-writing hardware/software.
Who should use it
- Planning an NDEF record's structure before programming a batch of NFC tags.
- Learning how NDEF records are structured.
Industry applications
- IoT/hardware prototyping
- Retail and marketing (smart NFC tags)
Advantages
- Follows the real NDEF record structure.
- Supports several common record types.
Limitations
- Formatting only — does not write to physical NFC hardware.
Common mistakes to avoid
- Expecting this browser-based tool to physically program an NFC tag — that step needs separate NFC hardware/software.
Best practices
- Use this to double-check your record structure is spec-correct before writing it with your NFC hardware's own software.
Tips
- See the RFID Data Generator for a similar formatting reference for RFID (EPC) tags instead of NFC.