First of all, trying to land on Jupiter would be a bad idea:
Jupiter is made of mostly hydrogen and helium gas. So, trying to land on it would be like trying to land on a cloud here on Earth. There’s no outer crust to break your fall on Jupiter. Just an endless stretch of atmosphere.
The big question, then, is: Could you fall through one end of Jupiter and out the other? It turns out, you wouldn’t even make it halfway. Here’s what would happen if you tried to land on Jupiter.
Go to the whole article (and watch the fascinating animated video).