Chrome has this built in; I don't use an extension. There's a "Share" icon on the right side of the URL bar, with "Copy link", "Send to your devices", "Create Q

Chrome has this built in; I don't use an extension. There's a "Share" icon on the right side of the URL bar, with "Copy link", "Send to your devices", "Create QR code", "Cast", and "Save page as...". You create a QR code, it's displayed, along with its URL, and you can "Copy" or "Download" it.