Can Wall tiles be used on floors?

If you mean ceramic, no. They aren't sturdy enough for floors. If you mean other kinds--it depends on what they're made of. You shouldn't use any tile on the floor you can't walk or jump on without damage. Furniture weighs more than you do (hopefully) and it will really tear them up. Repeated foot traffic with loosen and damage them too. 

nope there to thin to support the extra weight .wall tiles are 3/16 inch thick and floor tiles are over 3/8 inch thick . different weight rating after all you dont walk on the wall do you .

I would never take the chance of using wall tiles on my floor, because there are thousands of floor tile choices.

That's like using interior paint on the exterior of your house while hoping it does not peel off.

There is a reason a wall tile is labeled as such.

yes but they might be too slippery 

No, but you can use floor tiles on the wall.  Wall tiles are not designed for foot traffic.

I don't think I've seen a wall tile with a wear ratting 

it is possible but should be restricted to only a light duty floor such as a bath

No they are tooooo slippery 

They will probably crack, because of the weight constantly put on them.

whilst its possible most floor tiles are thicker