If you throw a party and you want to conveniently share your guest wifi network details with your guests just create a QR code with the wifi configuration. You could also do this if you own a public place with free-wifi and spare your customers/visitors of the hassle of configuring the wifi. The QR code would do it for them.
It’s easy. Just use your favorite QR code generator with a crafted string having the following pattern:
WIFI:T:WPA;S:mynetwork;P:mypass;;
| Parameter | Example | Description |
|---|---|---|
| T | WPA | Authentication type; can be WEP or WPA, or ‘nopass’ for no password. Or, omit for no password. |
| S | mynetwork | Network SSID. Required. Enclose in double quotes if it is an ASCII name, but could be interpreted as hex (i.e. “ABCD”) |
| P | mypass | Password, ignored if T is “nopass” (in which case it may be omitted). Enclose in double quotes if it is an ASCII name, but could be interpreted as hex (i.e. “ABCD”) |
| H | true | Optional. True if the network SSID is hidden. |
source: Wi-Fi Network config (Android, iOS 11+)
HN thread: Pure JavaScript WiFi QR Code Generator