Which port city was the first capital of Pakistan?

Karachi was the first captial after the independance of pakistan.

In 1958, a commission was constituted to select a suitable site for the national capital with particular emphasis on location, climate, logistics, and defence requirements, along with other attributes.Built as a planned city in the 1960s for capital of Pakistan, Islamabad is noted for its high standards of living, safety, and abundant greenery.