You can create a QR code within your Chrome browser since it has its own built in QR creator.
Navigate to the url you want to share, select the "share" icon in the main navigation bar, then select the option to create a QR Code. Then simply download the image and you've got your QR Code.
If you don't use Google Chrome as a browser then there are free QR code generators available that you can use to create a code with your desired URL, just use a search engine to find one that will work for you.