Waifu2x is an AI based image scaler and smoother. It can take a small image and make it dimensionally bigger as well as smoothing the edges. The end result is nice and pretty. Waifu2x is mainly intended for illustrations, anime images, drawings and comic type material. However it works on photos too. Below is an example.
I compiled the spectacular Waifu2x for macOS. I built it on macOS 12.0.1 using the latest available xcode. This particular build is for both x64 and Apple Silicon systems. The original github page can be found below.