You can scan a QR code using the camera on your smartphone, tablet, or computer — however, you may need to download an app.

You can use your iPhone to scan documents, QR codes, and other files using the Notes app and your camera.

Sharat Potharaju is cofounder and CEO of Uniqode, whose vision is to enable digital connection with every physical object and place. QR codes drive 37% click-through rates, while email campaigns ...