To check if your QR Codes work properly, use your Smartphone’s QR Code reader app to scan the code. Note that devices running on iOS 11 or later and most Android smartphones already have a QR Code reader built into the camera.
Scan the QR Code by opening the Camera or reader app and face the phone camera towards your code. You will see the code displayed on your phone screen. If your QR Code is readable, the encoded address or action will be accessed automatically. It is important to test the QR Code printed in its actual size.