vCard Generator — Build a .vcf Contact Card and Its QR Code

Version 3.0 unless you have a reason not to — iOS, Android, Outlook and Google Contacts all read it. Version 4.0 is the current standard and handles international numbers more cleanly, but older Outlook builds and some Android address books still refuse it.

Because a vCard is a lot of text and every field adds to it. A name, one number and one email fits comfortably; add three numbers, an address and a note and the code climbs past the point where it will scan off a business card. The density check tells you which side of that line you are on, and the error correction level is lowered automatically as the card grows.

The vCard specification limits a line to 75 octets and requires longer ones to continue on the next line with a leading space. Strict parsers reject a card that ignores this, and the count is in bytes rather than characters, so accented or non-Latin text folds sooner than its length suggests. Both are handled here.

Yes — as many as you like, each tagged as mobile, work, home, fax or main, and the same for email addresses and websites. Most generators offer one of each and leave you hand-editing the file, which is exactly where the escaping goes wrong.

Yes. Save it with a .vcf extension and open it, or email it to yourself and tap the attachment. iOS, Android, Outlook and Google Contacts all accept it. The QR code carries the identical card, so scanning it with a phone camera offers to save the same contact.