What's the best free AI image upscaler?

Question

I was using this one for a while (https://imgupscaler.com/) and I think it has the best results of any I've tried. Recently, it started limiting access only to paid users. I've tried several others and found them lacking.

mtmail · Accepted Answer

https://imageupscalerai.com/ got good feedback in its 'Show HN' last week https://news.ycombinator.com/item?id=36418648

Unknownaliense · Answer

I just found out a non-mainstream upscaler tool called Nero AI, and it's free for 5 credits per day, also the UI is quite good.https://ai.nero.com/enhance/