For what it's worth after the fact - apps like the one below will create QR from the hamburger. I've used this to label paintings in a gallery with painter's details, item price etc etc (as well as simple URL and so on). Can't remember how many characters QR allows....(4k (?)) Dunno.
I hope this link has copied properly...
The fastest QR code reader and Barcode scanner.
play.google.com
No doubt there are many, this one works.