I use adobe lightroom. It has an enhanced algorithm that really does a very good job at upscaling images. You might also try https://imglarger.com/. Source: over 1 year ago

But this time I just googled and ended up with https://imglarger.com/ that did the job well. Source: over 1 year ago

I don't, but try imglarger.com, it's A.I. That scales up an image, I always get amazing results. Source: almost 2 years ago

Hey, this picture looks so cooool!! I save your original image and upload it to imglarger.com to sharpen it. Here is the result. I am not sure if it is what you want. But I think the the color and contrast is better after the image is sharpened by imglarger. Source: almost 2 years ago

Image was upscaled with imglarger.com as Dall.E's output images are way too small. Source: almost 2 years ago

UnDraw - A constantly updated collection of beautiful SVG images that you can use completely free without attribution. - Source: dev.to / 4 months ago

Thanks! That's good feedback, currently the images are selected from the open source collection at https://undraw.co, but as a next step we'll add the option for AI generated images. - Source: Hacker News / 10 months ago

Https://undraw.co/ is a good resource and they're open source. Source: about 1 year ago

Look into Undraw (https://undraw.co/). I'm not sure if these can be used for commercial purposes, but if it's for a portfolio piece, these work excellently! Source: about 1 year ago

If you are looking for some premade images try undraw.co (opensource) and icons8.com (have to credit their images). Source: over 1 year ago