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

Scanning a QR code with your phone is a common request, and should be simple, right? But it's not always as obvious how to do it as it should be. Read on for straightforward, illustrated instructions ...

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