A QR code is a 2D image that can be scanned with a QR code scanner app, which can be downloaded and isntalled on mobile devices with a camera on it. When the code is scanned, the app decodes the code and displays it in the app. It can be a URL, an email address, a contact profile, or just about anything else as long as it is no longer than 500 characters.
For example, suppose you have a long URL that you want people with mobile phones to access rather than having them type it in. Just paste your URL into the input box below and then press the TAB key to see the result. You can then right-click on the image to save it to your computer as a graphic.
QR Scanner Apps
There are many QR code scanner apps that have been created for different mobile operating systems. Here is an example of one that also scans for malicious codes, produced by Kaspersky Labs.