So, best online upscaler?

So, I have a 3060 12GB and when I do 4x upscale, it takes forever and my computer starts to sound like a GE Turbofan that is about to suffer a critical existence failure. What is the best current online upscaling service? Hopefully flexible (for art and photoes) and also, not censored so that it won't go "heaven's to betsy! that image has BLOOD on it! And you can see her ankles!" It doesn't have to have a lot of bells and whistles, just do the upscaling job.

Thanks!