QR code generator?

Has anyone used a QR code generator? Which service would be the best?

There are no better or worse services. It all depends on your preferences. For example I like it when the interface is convenient, you can quickly create qr codes and there are no obstacles to do so. I prefer to use this service to generate qr codes https://abgl.link/qr-code convenient interface. And also in a personal account will be able to view the history of the creation of their codes.