Just type "qr code generator" into any search engine. Paste in your ln address. There's no risk of sharing or uploading an ln address.
Discussion
I did that and it didn't generate 😬 I was using vipsats app
Huh, vipsats? No, use Google or duckduckgo, any search engine will give you links to websites where you can paste text and spit out a qr code image for free that you can save.
Ya, I did that with an address from vipsats