Before you print
How big should it be?
Rule of thumb: printed width ≥ scanning distance ÷ 10. Pick the surface above and the studio sizes the code for you, then checks the printed module size against what a press can actually hold.
Questions people actually ask
No. The code is generated 100% in your browser, and the password is deliberately kept out of the page URL too. Nothing about your network ever leaves your device.
WPA/WPA2/WPA3 (choose WPA), legacy WEP, and open networks. Phones treat WPA3 the same as WPA2 for QR purposes.
Yes. iOS 11+ and virtually all Android versions connect directly from the camera app.
Yes — after generating, try the WiFi card tool for a printable A6 card or table tent with 'scan to connect' instructions.
Want the detail? How wifi QR codes work — the payload format, what scanners do with it, and where it breaks.