that is a horrible image resizing tool and you should feel bad.
Yeah you'll suffer quality loss but I was just pointing out that pretty much anyone can resize images.
Idiotic little practice GIF here.
-snip-
I hate how Picasion messes with the pixels, makes them rounded. Nobody likes you, Picasion.
If the resize window has some kind of "Quality", "Interpolation", "Sampling" or "Filter" option, set it to "Nearest Neighbor" or "None". That should keep pixels form getting blurry.