Among the many changes brought about by the pandemic is the widespread use of QR codes, graphical representations of digital data that can be printed and later scanned by a smartphone or other device, ...

Software built into the cameras on iPhones and Android phones makes quick work of decoding QR codes. How do you do that on a laptop or desktop computer? I have a friend who calls me occasionally to ...

Savvy iPhone users know what to do when they see a QR code in the wild. Open the Camera app, aim, and tap the link that gets revealed. But what about QR codes in images and PDFs that are already on ...