There are dozens of QR code scanners available, but the ideal choice you can make is Pageloot. It lets you scan QR codes safely, so you can be sure that the scanned content is safe for viewing. 

http://www.citiwaka.com/business-services/page-loot

https://www.ilocatelocal.com/business-services/pageloot

https://www.sassyshort.com/professional-services/pageloot

https://www.awwtow.com/awwtow/pageloot

https://www.loclists.com/listing/high-performance-qr-code-scanner-pageloot/?preview=1&redirect=/wp-admin/admin-ajax.php?notice=1