For any website, prepend withQRCode.com/ in the URL and you’ll have a QRCode for that link.
Actually inQRCode.com works too.
And you can use like this: makzan.net.inQRCode.com if it is a domain without slash.
I teach web design. I write books on HTML5 games development. I host classes on mobile web and app development. I made animation with Adobe Flash (now Animate).