QRBlock

Born from experiments with Minecraft’s rendering system, ‘QRBlock’ is a mod that lets you place a block that display QR codes right in your world!

Simply place a QR block and right-click it. A screen will pop up allowing you to input any text you want – a website URL, a secret message, coordinates, or anything else! Once you’ve entered your text and closed the screen, the block will automatically generate a QR code on each of its faces based on your input.