vCard QR — name, phone and email in this tab

What a contact QR actually is

The camera is not “adding a friend in Mark.” It is reading a vCard 3.0 block: BEGIN:VCARD, name, org, title, tel, email, URL, END:VCARD. Long lines are folded so the payload stays valid. Mark builds that block in the browser. We do not keep an address book.

Fill only what you want a stranger with a camera to have. A badge at a booth is public. A private mobile number on a poster in a corridor is public too, whether you meant it or not. Ask before you print someone else’s card.

Keep it short

Five addresses, a biography and three websites will either hit capacity or produce a dense square that only scans at large size. Name plus one phone plus one email is enough for a handshake. Put the rest on the URL field as a single https link.

For talks and check-in, see events. For print size and stock, see print.