QR codes, a popular tool for providing contactless payment options and digital menus, are smarter, more versatile alternatives to 1D barcodes. Their high character capacity is one reason they're ...

A 2D barcode appears as a small, square matrix (like the QR code, for example) instead of vertical lines, and requires an optical scanner or camera (like the one in your smartphone) to access ...

The 2D versions of barcodes look like squares or rectangles containing many small, individual dots – QR codes are one version – and can hold a lot more information, which is encoded on both ...

The codes are designed to hold a relatively large amount of data in a small space — just under three kilobytes of binary data, or more than 4,000 letters and numbers.