How a vCard QR code works
The code contains a contact card in vCard 3.0, the format address books have shared for decades. A short example looks like this: BEGIN:VCARD, VERSION:3.0, N:Smith;Jane;;;, ORG:Acme Inc., TITLE:Manager, TEL;TYPE=CELL:+14155552671, EMAIL:[email protected], END:VCARD, each on its own line. Work phone, website, address and a note are added only if you fill them in.
Scanning it with the iPhone Camera app or most Android cameras shows a contact preview with a button to add it. The person can review and edit the details before saving. No internet connection is needed, because the whole card is inside the code.
Every field adds characters, and characters add squares. A card with name, mobile and email is compact; adding a long address and note can double the density.
Where it helps
- A business card carries a code on the back, so a new contact lands in the phone with the name spelled correctly and the number already formatted.
- A conference badge includes a vCard code, which is quicker than exchanging cards and typing details after the event.
- A real estate agent adds a code to yard signs and flyers so buyers can save the agent's number while standing outside the house.
- A front desk keeps a code for the after-hours support line, so visitors save it before they leave.
Tips before you print
- Fewer fields mean a less dense code. On a small business card, name, mobile, email and website are usually enough.
- Write phone numbers with the country code, such as +1 415 555 2671, so they dial correctly for contacts abroad.
- Leave the note short or empty. It is the field most likely to push the code into a size that is hard to scan on a card.
- Save the contact from your own code on both an iPhone and an Android phone, and check that names and numbers land in the right fields.