Friends come to your house and ask you to tell them your WiFi password. You may not want to, or if it's a complex code, you will have to type it in for them.
This can be very frustrating if many people come to your house. Below we will see how you can speed up the process by using a QR code, which can be scanned by your friends to connect to your network.
Visit the qifi.org page from the program browsing of your computer
Enter your WiFi connection SSID, encryption type and password
Generate the QR code and print it to paste it somewhere visible.
You can use others tools, such as ZXing QR Code Generator or QR4 Generator for the same effect. Now you don't have to type the password for all your friends every time.
WiFiBroot: Wi-Fi Pentest Cracking Tool [WPA / WPA2]