Encoding data in decimal requires many more characters than the same data encoded in base64—06513249 vs YWJj—but using decimal is better when stored in a QR code. The magic of QR modes means all those extra digits are stored efficiently, almost as though there was no encoding at all. Decimal encoding makes for QR codes that store more data, or are easier to scan. In this post, we’ll see: how using a decimal encoding (slightly) reduces the density of a QR code containing a URL, in practice; why Q...