Security & Utility Tools

Universal NFC Tag Command Builder for Contact Sharing Tag

Create custom NFC tag command payloads for WiFi connection, vCards with photos, and NDEF data. Export to QR code.

Universal NFC Tag Command Builder

Universal NFC Payload Builder

Configure standard NDEF (NFC Data Exchange Format) payloads. Copy raw NDEF structures or write via QR codes instantly.

Generated NDEF Payload String

Dynamic QR Backup & Programmer Link

Scan this QR code with your phone to instantly load the payload, or write it onto physical cards.

How to Write this NDEF Payload to an NFC Tag

Follow these steps to write your generated string onto standard NTAG213, NTAG215, or NTAG216 tags using free apps.

1
Install NFC Tools: Download the free NFC Tools app from the Apple App Store or Google Play Store.
2
Copy Payload: Click the "Copy NDEF Payload" button above.
3
Write in App: Open NFC Tools, select Write > Add a record > Custom data / Text (or WiFi / vCard) and paste the payload, then tap Write / Write tag.
4
Hold to Tag: Place the top-back edge of your phone near the physical NFC card or tag until writing is confirmed.

What is NDEF Protocol & Why is it Used?

NDEF, which stands for Near Field Communication Data Exchange Format, is the global standardization format used to transmit packets or command structures to contactless physical NFC tags. By structuring payloads like WiFi or vCard files exactly according to NDEF specifications, mobile operating systems (iOS and Android) can read and process them instantly on tap without installing external apps.

Easy WiFi Sharing
Code a WiFi record payload onto a sticker. Guests tap their phones to log in without passwords.
vCard Encoding
Share complete digital business cards with custom photos, phone, company info, and email addresses instantly.
Dynamic QR Backup
Every generated payload outputs a downloadable QR code so users without NFC capability can scan to configure.

Frequently Asked Questions (FAQ)

Which physical tags are supported?
Our builder generates standardized NDEF payloads compatible with all popular NFC chips, including NTAG213, NTAG215, NTAG216, and Mifare Ultralight.
Why is my vCard not writing?
This usually occurs due to size limits. Physical tags like NTAG213 have only 144 bytes of space. NTAG215 has 504 bytes. If you upload a profile picture, ensure it is small (e.g. 90x90px) to prevent payload overflow.
Do users need to install an app to read the tag?
No! Modern Android and iOS devices feature native background NFC tag reading. Tapping a correctly programmed WiFi or vCard tag triggers direct connection popups natively.
NDEF Payload copied!
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Universal NFC Payload Builder

Configure standard NDEF (NFC Data Exchange Format) payloads. Copy raw NDEF structures or write via QR codes instantly.

Generated NDEF Payload String

Dynamic QR Backup & Programmer Link

Scan this QR code with your phone to instantly load the payload, or write it onto physical cards.

How to Write this NDEF Payload to an NFC Tag

Follow these steps to write your generated string onto standard NTAG213, NTAG215, or NTAG216 tags using free apps.

1
Install NFC Tools: Download the free NFC Tools app from the Apple App Store or Google Play Store.
2
Copy Payload: Click the "Copy NDEF Payload" button above.
3
Write in App: Open NFC Tools, select Write > Add a record > Custom data / Text (or WiFi / vCard) and paste the payload, then tap Write / Write tag.
4
Hold to Tag: Place the top-back edge of your phone near the physical NFC card or tag until writing is confirmed.

What is NDEF Protocol & Why is it Used?

NDEF, which stands for Near Field Communication Data Exchange Format, is the global standardization format used to transmit packets or command structures to contactless physical NFC tags. By structuring payloads like WiFi or vCard files exactly according to NDEF specifications, mobile operating systems (iOS and Android) can read and process them instantly on tap without installing external apps.

Easy WiFi Sharing
Code a WiFi record payload onto a sticker. Guests tap their phones to log in without passwords.
vCard Encoding
Share complete digital business cards with custom photos, phone, company info, and email addresses instantly.
Dynamic QR Backup
Every generated payload outputs a downloadable QR code so users without NFC capability can scan to configure.

Frequently Asked Questions (FAQ)

Which physical tags are supported?
Our builder generates standardized NDEF payloads compatible with all popular NFC chips, including NTAG213, NTAG215, NTAG216, and Mifare Ultralight.
Why is my vCard not writing?
This usually occurs due to size limits. Physical tags like NTAG213 have only 144 bytes of space. NTAG215 has 504 bytes. If you upload a profile picture, ensure it is small (e.g. 90x90px) to prevent payload overflow.
Do users need to install an app to read the tag?
No! Modern Android and iOS devices feature native background NFC tag reading. Tapping a correctly programmed WiFi or vCard tag triggers direct connection popups natively.
NDEF Payload copied!

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