Originally designed for industrial uses, QR codes have become common in consumer advertising. Smartphone users can install an app with a QR-code scanner that can read a displayed code and convert it to a URL directing the smartphone's browser to the website of a company, store, or product associated with that code providing specific information.
Maximum character storage capacity (40-L):
Alphanumeric 4,296 5½ 0–9, A–Z (upper-case only), space, $, %, *, +, -, ., /, :
Online URL => QR Code generator
www.the-qrcode-generator.com another one
Here is QR code link to this blog site: http://dragansr.blogspot.com