Based on japanese JIS X 0510 Quick Response Code standard, equivalent to ISO/IEC 18004
AstroQR is an easy and free web application witch uses the library kjua to generate QR codes. Using this JavaScript version of this standard implementation garatee that we do not collect any kind of logs about the codes you generate on this webapp: the QR Code will be generated fully and locally in your device, so you can relax about the data you put inside.
You can save any information you want inside a Quick Response Code, but there is a project named ZXing that pushed up some well extended markups for QR Codes that allow you to connect very easyly to a Wi-Fi network, fill a contact in your phone or add some meeting to your calendar. Just in a second, a QR Code on a business card, event flyer or invitation can be very handy!.