If you need to share a link with people via QR, it's easy to produce one in Chrome!
On a Windows device, head to the link in question, then hit the share arrow at the top-right of the URL bar. Select Create QR Code and it will populate one for you that you can download!
On a Chromebook, the QR button appears as its own selection - a gray four-square that will populate a QR code you can copy or download: