Let guests join your WiFi by pointing a camera at a code, with no password typed out loud. Nothing about your network leaves this page — the code is made in your browser.
The code stores your network name, its security type and the password in a format phones understand. A camera reads it and the phone offers to join. It works offline, because everything the phone needs is in the code itself.
No. The code is generated in your browser and the network details never leave your device. There is no account and nothing is stored.
iPhones on iOS 11 or later and Android 10 or later read them with the built-in camera. Older Android phones may need a QR scanner app.