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

QR codes are a type of barcode, or scannable pattern, that contain various forms of data, like website links, account information, and phone numbers.

You can find QR codes practically anywhere these days. Short for “Quick Response,” they’re the little black-and-white pixilated squares that are commonly found in print ads and business cards, on ...