QRreader

QRreader is a very small application in stature that is designed to offer you a simple and practical way of scanning QR codes and accessing their information.
To be able to use it, you need to have a webcam installed and connected to your computer. While the webcam is on, the application displays its live feed and you can use it to read the QR code that is displayed on a website or printed document.
As far as interface goes, QRreader only displays a small window for the camera stream and nothing else. That’s not in its disadvantage as it’s sole purpose is to read the QR code and then display the information that is embedded in it.
A scan is done by simply pointing the camera in front of the code and waiting a bit until the application finishes the read. When that’s done, it displays the information in a small window and allows you to copy it if it is an address or any kind of text. If the code is actually a link, you can access it directly from the application or have it automatically open it in your default web browser.
QRreader offers you a very simple and straightforward means of reading and deciphering QR codes which comes in very handy. From an application customization point of view, there’s not much to talk about. If you have multiple webcams connected to your computer the application allows you to choose which one you want to use. You can also toggle to hear a beep when a scan is complete or flip the video feed over its vertical axis.
In closing, if you’re looking for a lightweight and efficient QR code scanner for your computer, then you can certainly try QRreader.