Contact · messaging · tel: URI (RFC 3966)

Scan to call

A tel: link in the code. The scanner shows the number and offers to call — for a service desk sticker, a delivery note, a lost-and-found tag.

Make this code now →

Opens the generator with this type selected. Everything happens in your browser.

Round WIA Code carrying a phone number
Rendered by the same engine as the generator. Point the WIA scanner at it — or a plain camera at the small booster QR in the middle.

What the code carries

A tel: URI (RFC 3966) with the number in international form, so it dials correctly from abroad.

tel: URI (RFC 3966)

What happens when it is scanned

  1. The scanner reads the number from the code.
  2. It shows the number on a card — the person sees it before anything happens.
  3. One tap opens the dialler with the number filled in; nothing is dialled automatically.

Why a WIA Code for this

A phone number is tiny — the smallest grid holds it, so the code can be small and still keep a clear silhouette.
The number is shown before dialling; no premium-number surprises.
A shape that says what it is: a heart for a helpline, a circle for a desk.

How much fits

Measured on the live engine (bytes of content, after error correction). The QR column is a standard QR code of the same printed size, for comparison.

GridWIA Code (bytes)Same-size QR (bytes)With booster QR
S · 64 modules · round23960—
M · 96 modules · round608151—
L · 128 modules · round11283221092

This page's example is 18 bytes. The booster QR is a small standard QR placed in the centre so phones without the WIA scanner still get somewhere useful — it leads to the web scanner, which then reads the full code.

Questions people ask

Does it dial automatically?
No. The dialler opens with the number; the person presses call.
Which grid should I use?
S is enough for a number. Use M if you want a fuller silhouette on a larger print.
Can I include an extension?
Yes, as part of the number field; write it the way your phone system expects.
Does a plain camera work?
The booster QR opens the web scanner, which then shows the number.
Is the number tracked?
No. Reading and dialling happen on the phone; WIA sees nothing.
Make this code now →All kinds of content →

Other kinds of content

A business card the phone can saveA text message, pre-writtenAn email, ready to sendAll kinds of content →

WIA Code is a radial-symmetry 2D code. The content lives in the code; there is no server in between when it is scanned. Generated with the WIA Code engine · scannable · no account needed