Type your network name (SSID) and password, pick the security type — WPA/WPA2 for almost every modern router — then download the PNG and print or frame it where guests can scan it.
Both iPhone (iOS 11 and later) and Android (version 10 and later) read WiFi QR codes with the built-in camera app and offer a Join Network prompt. Older Android phones may need a QR scanner app, and the code still shows the network details in plain text as a fallback.
No. The code is built entirely inside your browser using the standard WIFI:T:WPA;S:name;P:password;; format, and nothing is uploaded, logged or stored. Close the tab and no trace of the password remains.
Yes — tick the hidden network option and the code includes the H:true flag, which tells the phone to look for an SSID that is not broadcast. Without that flag some phones silently fail to connect to hidden networks.