Wi-Fi QR code — 720px PNG

Worked example

Make a Wi-Fi QR as a 720 px PNG for print up to about A6: enter the network name, security type and password, then scan the download.

A guest-network card printed at A6 should use a dedicated guest SSID and a password you can rotate, because anyone who photographs the card can join and the password is readable inside the code. Print the name and password as text beneath it too, for devices that cannot scan.

The Wi-Fi code is about 41 × 41 modules at level H, so after the default 18 px margin 684 of the 720 px hold the pattern and one module is about 16.7 px. Printed at 300 dpi the Wi-Fi code is 61 mm wide (1.41 mm modules), fits an A6 card of 105 × 148 mm and reads from about 61 cm.

Common mistake with a 720 px Wi-Fi code: trusting the PNG's built-in border as the quiet zone. On the Wi-Fi code the default 18 px margin is only 1.1 modules, while scanners want about 4 (67 px). The slider stops at 48 px (2.9 modules), so leave a blank border of at least 5.6 mm around the printed Wi-Fi code in your layout, and keep contrast at 4.5:1 or better, since the tool refuses to export below that.

At 720 px the default centred logo covers 22% of the code width, and with 41 modules the Wi-Fi pattern is dense, so lower the logo size slider (12 to 32%) or remove the logo.

Check the 720 px Wi-Fi file before using it: scan the download with two different phones, and for a print do it from about 61 cm, ten times its 61 mm width. At 720 px the result should be this: the phone offers to join Chatcument-Guest and connects, ideally on a device that has never saved that network.

SSID: Chatcument-Guest
WPA: example-only

PNG · 720 × 720 px

WIFI:T:WPA;S:Chatcument-Guest;P:example-only;;

A 720 px Wi-Fi PNG prints 61 mm wide at 300 dpi, so judge it at that size before sending it to print.