You can try HordeNG which has the ability to generate QR codes within a picture of your choosing. You can choose a resolution of 1024x1024 and a 4x upscaler which would bring the resolution to 4096x4096.
I don’t think all of that is possible with an account with no kudos (credits), but feel free to PM me, I can gift you an api key with some kudos to play around.
averyminya@beehaw.org 3 weeks ago
This was what I came to suggest for you
OsrsNeedsF2P@lemmy.ml 3 weeks ago
I actually forked this and customized the code. I’ll publish it soon so others can follow