How can I shrink a web page to fit my iPad Air. Can't see the right side to complete a purchase.

Hi. If the page is bigger than the screen, you should be able to move it around with your finger to reach the other side. Or you may be able to pinch together to shrink it to fit. If you cannot do either of these, the site may simply not be compatible with mobile devices, and you'll need to access it from a computer.