Scanning a QR code without your phone requires a little help from Google or a webcam.

QR codes can house a whole lot of data, from the URL of a webpage or service, to where to directly download an app. Here's how to scan them.

QR codes are a close cousin of the bar codes on product packaging that cashiers scan with infrared scanners to let the checkout computer know what products are being purchased.

QR codes are a close cousin of the bar codes on product packaging that cashiers scan with infrared scanners to let the checkout computer know what products are being purchased.

Can you scan a QR code from a screenshot or photo? Yep, you can.

Bar codes store information along one axis, horizontally. QR codes store information in both vertical and horizontal axes, which allows them to hold significantly more data. That extra amount of ...