Here is the best Free QR Code Generator.
They allow you to make a whole range of QR Codes in a variety of formats. Even EPS format that allow for easy scaling and big printing.
I have tried other QR Code websites where at firs they appear great, but the fine print says you have to pay if you want your QR codes to continue after 14 days or so. The then disable your QR code if you have not paid. They do this by creating shortlinks for your URL’s instead of using your unique URL in the code – worse if they go out of business – you loose links from your QR Code – Sneaky Sneaky!
Use the following free QR Code Generator that does it the right way so your code always works: http://goqr.me/