You can apply for change of status from H1B to B1/B2, but you need to be careful about timing and save all records of employment lest the USCIS inquire as to why you're seeking a tourist visa while you're in H1B status. You will need to be able to prove that you can support yourself during your stay as a tourist.

As we know next to nothing about your situation, including your nation of origin and whether you qualify for the visa waiver program, we're not in a position to get into specifics.