I'm trying to compile a nice website/portfolio for internships etc, and I have a folder filled with pixel art I've done (100's of images, not feasible to do them one at a time except if absolutely necessary).
Unfortunately, it's all a little small (32x32 and the like) and the website service I'm using, Squarespace, displays them at actual size. I really want to make all of my art 2x as big (or perhaps 4x as big) without losing the pixel quality (I don't want any blur or anything like that). I've looked in a lot of places and I can only find vague references to unwieldy command line programs that I can't seem to figure out or links to webtools that take several seconds per image to do.
I would much appreciate a step-by-step guide (or link to one) on how to do this in the simplest way possible, for free or very cheap. Thank you!