NFC business card: tap a phone to share your details

An NFC business card is a physical card with a tiny Near Field Communication chip inside that holds the web address of your digital business card. A phone that comes within a few centimetres reads that address and opens it, just like tapping a link.

What NFC is

NFC is a short-range wireless standard that works at 13.56 MHz. It is the same family of technology used by contactless payment cards and transit passes, but a business card tag carries no payment data. It simply stores a small record, usually a URL, in a standard format called NDEF (NFC Data Exchange Format).

What happens on a tap

1. The person unlocks their phone and holds the top of it against your card.
2. The phone reads the URL stored on the chip and shows a notification or opens the browser.
3. Your digital business card opens with your photo, details and links.
4. They tap Save contact to add you to their phone.

Why it stores a link, not your contact

NFC tags used for business cards have small memories, often a few hundred bytes. That is plenty for a URL but tight for a full contact record with a photo. Storing a link also means you can change your details on CardDeck without touching the tag.

Tap range

Reading distance is short by design, typically 1 to 4 cm. People need to touch or nearly touch the card to the phone, usually near the top edge on iPhones and the center of the back on many Android phones.

Most smartphones made in the last several years can read NFC tags without an extra app, but not all. That is why an NFC business card should always carry a QR code too.

iPhone

• iPhone XS and newer read NFC tags in the background: the screen needs to be on and unlocked, and a notification appears that opens the link.
• Some older iPhones from the iPhone 7 onward can read tags through the NFC reader in Control Center or a reader app, but not automatically.
• Background reading pauses while the camera is open or Apple Pay is in use.

Android

• Most mid-range and flagship Android phones include NFC. It must be switched on in settings, and the screen must be on and unlocked.
• Some budget phones and some tablets have no NFC hardware at all.
• The antenna position varies, so people may need to move the card around the back of the phone.

What this means in practice

Expect most, not all, of the people you meet to be able to tap. When someone's phone does not respond, point them to the QR code on the same card. Both open the same page, so the experience after that is identical.

If you want to compare how people actually open your card, CardDeck's card and QR analytics show views by channel, including NFC, QR, link and email signature.

You write your CardDeck card link to a blank NFC tag with a free NFC writing app on your phone. It takes about two minutes per tag, and you only do it once.

What you need

• Your CardDeck card link, for example carddeck.co/yourname. Copy it from your card's share options.
• A blank, writable NFC tag: a PVC card, sticker or key fob. NTAG213 tags are the most common for this and have room for a typical URL.
• A phone with NFC and an NFC writing app. Many free apps are available for iPhone and Android.

Steps

1. Open your NFC writing app and choose to write a new record.
2. Choose URL / link as the record type and paste your full card link, including https://.
3. Hold the blank tag to your phone until the app confirms the write.
4. Lock your phone, unlock it again, and tap the tag to test. Your card should open.
5. Test with a second phone, ideally one iPhone and one Android.
6. Optionally, lock the tag so nobody can overwrite it. Locking is permanent, so test first.

Should you write a vCard to the tag instead?

You can, but it is usually worse. A raw vCard cannot be updated once written, may not fit on small tags if it includes a photo, and gives you no way to count taps. Your CardDeck link can be updated forever from your account.

Using a dynamic QR code link

If you prefer, write the short link from a dynamic QR code instead of your card link. Then you can re-target both the printed code and the tag from one place.

For an NFC business card, a standard NTAG213 chip in a PVC card or sticker is enough. CardDeck does not sell NFC hardware: you can buy blank tags from any supplier and write your CardDeck link to them.

Common chips

• NTAG213: 144 bytes of user memory. Enough for a business card URL. The most common choice.
• NTAG215: 504 bytes. Useful if you also want to store other records.
• NTAG216: 888 bytes. Rarely needed for a link.

All three follow the NFC Forum Type 2 Tag specification and are read by NFC-capable phones.

Form factors

• PVC cards in CR80 size (85.6 × 54 mm), the same as a credit card. Easy to print your design and QR code on.
• Stickers: put one on the back of your phone case, a laptop or a paper business card.
• Key fobs and wristbands: handy at events or on a lanyard.
• Metal cards: look premium, but metal blocks NFC signals unless the card uses an on-metal tag designed for it. Check with the supplier.

Printing tips

• Print your name, title and a QR code on the card so it works for everyone.
• Avoid placing thick foils directly over the chip area.
• Keep the QR code at least 2 × 2 cm with a clear quiet zone. The QR code business card guide covers sizing and placement.

An NFC business card needs a QR code because some phones cannot read NFC, some have it switched off, and some people simply do not know to tap. A QR code works on any phone with a camera.

When tapping fails

• The phone has no NFC hardware or NFC is turned off.
• The phone is locked, or the camera or a payment wallet is open.
• The person taps the wrong part of the phone and gives up.
• A phone case with metal parts or a magnetic mount blocks the signal.

Make both paths obvious

• Put a short instruction on the card, such as "Tap or scan to save my contact".
• Print the QR code on the back, at least 2 × 2 cm.
• Use the same link for both, so analytics and contact capture work the same way.

What happens next is the same

Whether someone taps or scans, they land on your digital card, can save your contact and, if you turn it on, share their details back. Those contacts appear in CardDeck tagged with their source, ready to follow up in contact management.

Paper cards with NFC stickers

If you already have paper cards, you can add an NFC sticker to the back of a few for important meetings. Keep the QR code on every card.

An NFC business card is low-risk because the chip holds only a public link that you chose to share. It cannot read anything from the other person's phone, and it does not carry payment or login data.

What the tag shares

• Only the URL written to it. Anyone who taps sees the same public card a QR scan would show.
• Your card shows only the fields you choose. You can hide your phone number and keep email, for example.

Protecting the tag

• Lock the tag after writing and testing, so nobody can overwrite your link with a different one. Locking cannot be undone.
• Use your CardDeck link, not a raw vCard, so you can change or remove details without touching the tag.

If you lose the card

Because the tag only points to your CardDeck card, you stay in control. Update your card, switch to a new link, or deactivate the card from your account and the lost tag will no longer show your details.

Analytics and privacy

CardDeck counts views by channel in aggregate: dates, device type and approximate region. It does not identify the person who tapped unless they choose to share their details through the contact exchange form, which records consent and a timestamp.