A QR Code generator free online is a web-based tool that allows you to create QR Codes without having to download any software. To use a QR Code generator free online, you first need to select the type of information you want to encode in the QR Code. This could be a website URL, contact information, or even a coupon code. Once you have selected the information, you need to enter it into the QR Code generator. The generator will then create the QR Code and display it to you. You can then download the QR Code or share it online.