Scan the QR code using your smartphone's camera or a reader app to see whether it works correctly. If your QR code is readable and functional, the camera or app will open the link or the landing page. To make sure your QR code works as intended, test the code and the size before and after it is printed out. If you're experiencing problems scanning the QR code, it might be due to design aspects. To find answers to all questions about why a QR code might not be working, visit the "How to check if the QR code is working" blog and get detailed information.