Ever had 200 sprites to resize in one go? I know I had when I made this little tool.
Once the program starts it'll prompt you to put your sprites in the generated input folder, and to enter by how much you want to scale your sprites. (in mathematical values, so to resize it 200% enter 2 as it will take the sprite size times 2 to resize it). And that's all there is to it.
If you need the source for whatever reason, see Github.