A free app for Android, by WiFi Password Show.

WiFi QR Code Shower – Scanner is a free utility app for Android smartphones that allows users to generate and share a WiFi QR code with a simple click. The application can also be used to view the details of the WiFi network, including the name, the password, the IP address, and the network’s gateway. This app is useful when you want to share your WiFi with others, or if your home network is not configured.

How to generate the QR code:

First, you need to open the app. Next, enter the network’s name and the password. After that, click the ‘+’ button and select ‘Generate’.