You will find this procedure for each survey under the Survey links on the right-hand side of the Distribute page.
In order to create a QR code, you can make use of the built-in functionality. For this, you do not need a link to a third party website. By clicking on the red circled icon indicated above, the Survey link QR code window will be opened.
In this window you will find the following information in successive order: the language of the corresponding survey, the anonymous survey link, the created QR code and the download format to be selected: SVG or PNG.
You can now download the image with the QR code by clicking on either the SVG or the PNG button.