Version (QR Code)

QR code version is a number from 1 to 40 representing the code's size in modules. Version 1 is 21x21 modules, each version increment adds 4 modules in each dimension, and the maximum Version 40 is 177x177 modules.

As stored data increases, the version automatically rises. Higher versions store more data but increase module density, requiring larger print sizes for reliable scanning. For URL-length data, Versions 2-5 are typically sufficient.