I found nice jQuery plugin for generating QR codes written by Jerome Etienne: jquery.qrcode.
It’s fairly easy to use. Just pass a text to function and QR code is ready:
jquery('#qrcode').qrcode("this plugin is great");
Here is small application that generates QR codes on the fly as you type.
You can also download QR code as image (use: Chrome, FF, Opera or Safari for download).
Enter text:
Link to standalone QR code HTML5 application.
