Here’s how you can create a free and direct QR code without any third party advertisements or hosting;
Go to this URL;
https://www.shopify.com/pos/qr-code-generator
And enter your E-mail and the target URL (or website link) for the code;
Next, open your E-mail inbox and download the QR code image (usually in PNG format) and use it anywhere i.e. your visiting card, brochure, website, etc.