You walk into an airport and need to check in for your flight. Instead of a traditional paper boarding pass, you see a square black and white pattern on your phone. The agent scans it with a handheld device. Your flight information appears instantly. That square pattern is a 2D code. Unlike the linear barcodes on grocery products, 2D codes pack far more information into a compact square format. A 2D code generator creates these advanced codes. While QR codes are the most famous 2D codes, there are many others used in specific industries: Data Matrix codes in manufacturing, PDF417 codes on driver's licenses, MaxiCode on shipping labels. In this comprehensive guide, we will explore what 2D codes are, the different types, how generators work, and which code type to use for different applications. 1. What is a 2D Code? A 2D code is a machine-readable pattern that stores information in a two-dimensional grid. The Basic Concept Input: Data (text, numbers, URLs) Process: A 2D code generat...