Certificate QR Scanner is a free, convenient, and easy-to-use application for scanning and decoding QR codes and other types of bar codes. It is very easy to use: point the camera at the code, and the application will recognize the information and tell you what it decodes.

It is very fast and works with the built-in camera of your device. It can be used to check the validity of a document, and it can also be used to find out more information about a product.

You can also use it to check the product barcode of a product you are purchasing, so you can be sure that the product is genuine and has not been tampered with.