A QR code reader is a device or application that scans and interprets QR codes, which are two-dimensional barcodes. These codes can store various types of information, such as website links, contact details, or product information. QR code readers use a camera to capture the code and software to decode the information quickly. Many smartphones come with built-in QR code readers in their camera apps, making it easy for users to access the information encoded in a QR code. Additionally, there are dedicated apps available for download that offer enhanced features, such as saving scanned codes or providing analytics for businesses.