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.