Saw my toe nail and theres a cracked line going horizontally halfway across my nail.no bleed.only a little white around crack.can i save my nail?

Was it injured..??: If if it was injured and the nail root (matrix) damaged, all future nails maybe less-than-perfect, if there was no injury, then a normal nail may grow out, it would be a good idea to have a podiatrist check you out.

You can try: Worse case scenerio it falls off and a new one grows....I would look for a nail hardener and polish the nail with it.