Generation of the QR Code
Enter the text in the field below. It can be a multi-line text. Choose the options, then click on the generate button. This will display a preview of the QR Code. If you are happy with the result, press the copy button, this will put the needed CSV data needed for Altium Designer in the clipboard. Else press the new button and change the options.
The ECC define the level of redundancy and so the tolerance to read errors (even the lowest one is usually ok on PCBs). The quiet zone is the margin around the QR Code, needed for a correct reading (2 dots is usually a good choice). You can also choose the polarity of the QR Code (I prefer black dots as overlay, but some scanners are unable to read them as it looks like a negative QR Code).
Inclusion on the PCB
In Altium Designer, first open the "PCB List" window (Shift+F12):
Check on top left of the window that it is in edit mode. If it is in view mode, click on the "view" text to change it. Then right click and select "Smart Grid Insert" or type Ctrl-Ins. This will open the following dialog:
Click on "Automatic Determine Paste", this shall copy the clipboard data (upper table) to the attribute table:
Click on the "OK" button. You shall now see the QR Code on your PCB. It is composed of a lot of fills. I recommend that you select all these elements and create an union so you can move the QR Code without problem.