How to generate a QR code?

Works OK but I'd like my form, (parking reservation), once filled out by a customer, to generate two populated forms; one sent to the customer as an electronic reserved parking pass with a QR code containing their information and another sent to me as an electronic populated form. Upon entering my parking lot, the customer presents his electronic pass from his device for me to scan. The encrypted QR code information is cross referenced with the populated form I have on file to validate their parking reservation and confirm their attendance.

This is a re-post of a comment on Prepopulating Fields to Your Jotform via URL Parameters