You could make it aesthetically pleasing. Just make sure the data is boiled down to just a handful of bytes first and there won’t be anyway to reverse it.
Just blur the pixelization and it will look similar to the human eye, but with guaranteed information loss. Note that you should also discretize the colors of the pixels, which otherwise have 24 bits of information each; and maybe 2x2 pixelization might be a better idea.
A hard 3×3 pixelization would be much more reliable, if less æsthetically pleasing.