by Download a QR generator program: Download QR Code Studio
Optionally, you can use an online service to generate the QR at your own risk.
Feed this text adapted to your needs:
WIFI:S:My_SSID;T:WPA;P:key goes here;H:false;
Code type
ESSID
encryption type
WPA key
hidden SSID (true/false)
If needed, escape any special characters (“, ‘, ;, ,, or \) with a backslash