More About QR Codes

Unlike traditional bar codes which only contain information horizontally, QR Codes (Quick Response Codes) are designed in a matrix style with information in both horizontal and vertical directions. When scanned, QR Codes can cause mobile phones to perform a certain action like opening a browser window or email client. Also, QR Codes can be read from scanners in any position. QR Codes can be generated by a variety of free tools on the internet through websites like,, and .
 Image by Flickr user EEPaul.

Image by Flickr user EEPaul.

Watch the Common Craft video below, QR Codes in Plain English, for a quick and thorough explanation of QR Codes.
What it teaches (2:18)
This video explains how QR codes are changing the way we access information in the real world through scanning a new kind of code with a camera phone. It teaches:
•How barcodes and QR codes are similar •What happens when you scan a QR code with your camera phone
•What scenarios are useful for QR codes and what’s needed to scan them
•How QR Codes make the real world clickable
Link to Video

QR Codes can be read by dedicated QR Code scanners or by mobile phones. A camera with auto-focus and code reading software must be installed on mobile phones in order for the QR Codes to be scanned. A variety of QR Code reading software are available for free for all types of mobile operating systems (OS).  Once the proper software is installed, users must use their camera feature to scan the QR Code. Once read, the code will then send information back to the user’s phone or prompt the phone to make do an action. Click here to view a 30 second YouTube video showing an iPhone scanning a QR Code.

Websites for Creating Your Own QR Codes
  1. QR Stuff (QR Code Generator)
  2. Qurify! (QR Code Generator)

iPod/iPad Apps for Scanning QR Codes

  1. QR Reader (iOS / Android)
  2. Scan(iOS)
  3. QR Droid (Android)

What Other Libraries are Doing with QR Codes


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