With barcodify.me you can easily add to your website a "QR code", a 2-dimensional barcode that contains a link that can be opened with a smartphone. And it's free!
1. Add to your webpage(s) the following link:
2. That's it! When your page is opened, barcodify.me will generate a QR code (just like the one right here) that includes the address to the page.
3. Your visitors can now scan the code with a smartphone, and it will open your webpage directly into their mobile browser.
4. Check the howto-page for more details.