This page compares the real-world results of various image upscaling services.
zoom:
You can hover your mouse over the images to zoom in.
On mobile, you can click into the image to zoom in. 2 finger zoom is not supported.
view full image:
Right-click and choose "Open image in new tab" for a closer look.
On mobile, tap and hold the image to open it in a new tab.
navigation:
Use the navigation arrows or swipe left/right to see all images.