A QR code scanner is a digital tool designed to read Quick Response (QR) codes. These square-shaped, patterned codes store information that can be accessed by scanning them with a smartphone or a dedicated QR code scanning device. The scanner interprets the patterns within the QR code, typically leading to text, websites, or other digital data, providing a quick and efficient way to access this information without manual input. QR code scanners are widely used in various applications including marketing, ticketing, payments, and product identification.