Comment by WelcomeShorty

With the (ATM) highest version of QR codes and the minimal error correction, you're limited to 4,296 bytes(0).

And V40 is not something I've seen(1) in the wild :)

0: https://www.qrcode.com/en/about/version.html 1: https://commons.wikimedia.org/wiki/File:Qr-code-ver-40.svg