QRStuff is the world's leading QR Code Generator. At QRStuff they pride themselves in offering everyone who visits their site the opportunity to quickly, easily and freely generate QR codes to suit their every need. They don't use the Google Charts API for QR Code generation - they've gone to the trouble of building and developing a custom ISO-compliant alogorithm - so they aren't bound by the data type, image size and resolution limits imposed by other sites that use somebody else's third-party generator as their back-end.