As you've written it, there's no apostrophe and is not meant o be one. But you might be asking what is the contracted form of you will, in which case the answer is you'll.
"Its" without an apostrophe shows possession, as in "its hair is brown." Other possessive pronouns include my, your, his, her, our, and their. "It's" with an apostrophe is always a contraction of two...