In case you want to generate #QRCodes with #CrystalLang, there's a new kid in town.

Soya Daizu's Goban promises to be even faster than the qr-code Shard and it has support for Kanji.

https://github.com/soya-daizu/goban#goban

GitHub - soya-daizu/goban: A fast and efficient QR/Micro QR/rMQR Code implementation in pure Crystal

A fast and efficient QR/Micro QR/rMQR Code implementation in pure Crystal - GitHub - soya-daizu/goban: A fast and efficient QR/Micro QR/rMQR Code implementation in pure Crystal

GitHub