Here is an easy way to create a QR code using an easy online tool from a website that has tons of great info regarding cryptos and tools to track them. My coinbase and Xapo wallets offer pre-generated QR codes however some others do not.
QR Code Generator <—- click here
I tried it out. Here is mine.
All I did was enter my bitcoin wallet address, choose a size for the code and download the generated image
Hop over to the generator at GoBitCoin
If you have never sent bitcoin using a QR code, you are welcome to test out the process by sending me a few mSatoshi or something, hee hee. Obviously, I am not the first person to think of that trick.