How it works
The code holds the network name, the kind of security and the password in a short text of the form WIFI:T:WPA;S:name;P:password;;. This form is documented by ZXing, the open-source barcode library. Scan the code with a phone's camera or QR reader to join the network.
The code is drawn on this page. The network name and password are not sent to PineKey or saved, and the PNG you download is made on your device.
Anyone with the picture can join
The password is in the code as plain text, and any QR reader shows it. Put the code only where the people who see it should have the network: a guest network in the reception is a better fit than the network your office computers use.
If you change the Wi-Fi password, make a new code and take the old one down.
Which security setting to pick
Pick the setting your router uses. WPA covers WPA, WPA2 and WPA3 networks with a password. WEP is an old method; if your router still uses it, change the router setting first. Tick that the network is hidden only if it does not show up in the list of networks.
Sources
Keep it somewhere safe
A password you cannot find again is no help. PineKey keeps your passwords in a vault that is encrypted on your device, and lets you share logins with your family or team. Free for up to 3 people.