vCard QR Code Generator

• Encodes a vCard 3.0 record, the phone-contact standard
• iPhone shows an Add to Contacts card from the camera
• Android offers to create a contact via camera or Lens
• Name, phone, email, company and title import reliably

The code contains a vCard 3.0 record, the same format phones use to exchange contacts. iPhone shows an “Add to Contacts” card straight from the camera; on Android the camera or Google Lens offers to create a contact. Name, mobile number, email, organization, job title and website are the fields that import reliably on both platforms.

• vCards hold more data than a URL, so codes get dense
• Korean text costs more bytes and bumps the QR version
• Minimal fields fit a 45×45 grid at error correction M
• A logo forces error correction H, adding 3-4 versions
• For a richer profile, link to a web page instead

A vCard holds far more data than a URL, so the code gets dense quickly. Korean text costs more bytes than English: a typical card (name, company, title, mobile, email, URL) measured 152 characters / 186 bytes in Korean, needing QR version 10 (57×57 modules) at error correction M, while the same fields in English measured 181 characters / 181 bytes but only needed version 9 (53×53). A minimal card — just name, mobile and email — fits a smaller version 7, 45×45 grid at M. Raising error correction from M to H adds three to four versions (45→57, 57→73 modules), and adding a logo forces H automatically, so a logo on a contact card carries a real density cost. Fill in only the fields you actually need.

If you need a richer profile (photo, social links, multiple addresses), put those on a web page and use a website QR code instead; the contact card can carry the page URL.

• Software decode of a shrunk image still read at 90px a side
• That's roughly 1.4 to 1.7 pixels per module
• A 512px download puts about 7.9px in each module
• Below 3:1 contrast, the tool shows a warning

We shrank a 512px download (default settings: error correction M, 4-module quiet zone) and read it back with the same jsQR reader the site uses for its scan check. All three test cards still decoded at 90px on a side, or roughly 1.4 to 1.7 pixels per module, and failed one step smaller — we only tested in 10px steps. That is a software decode of a resized image file, not a phone-camera or print test. As pure arithmetic: a 512px PNG of the standard Korean card (57 modules plus 4 modules of quiet zone on each side) puts about 7.9px in every module; at 300 dpi, printing that same code at 3 cm works out to roughly 0.46 mm per module, and 2 cm to about 0.31 mm. These are calculations, not a guarantee that a given size will scan.

Contrast matters too: the site warns below a 3:1 ratio. Dark green on cream measured 7.4:1 and drew no warning, while light green on white measured 1.7:1 and triggered one. For printing, download the SVG so the code stays sharp at any size. We have not tested a physical print scanned with a phone camera — try a couple of phones on a test print before running a full batch.

• Details are encoded directly, never stored on a server
• Nothing expires and there is no account to lose
• No third party sees who scanned your card

Your details are encoded directly into the pattern and never stored on a server. There is nothing to expire, no account to lose, and no third party that sees who scanned your card.