By the mid-1960s, they had more than a half dozen locations in the Birmingham metro area: the original Homewood store, Roebuck, 3rd Avenue West, Bessemer, Five Points West, Vestavia, Eastwood Mall, Alabaster and Center Point, and additional stores as far away as Mississippi and South Carolina.

In 2015, Jack's was acquired by a fund managed by Onex Corporation, a private equity company based in Toronto, Canada.

Jack's also serves pancake breakfasts, wraps, and a variety of sides, such as hashbrowns, grits, and gravy.

For lunch and dinner, the signature items is the Big Jack, a double patty cheeseburger with a cult following,[6] with a variety of side items, including French fries, coleslaw, green beans, mashed potatoes and their famous biscuits.

Seasonal and limited-time offerings also appear on some menus, such as lemonade shakes and the Mushroom & Swiss Burger.

[7] Jack's restaurants were originally walk-up stands with a slanted roof and vertical orange and yellow stripes on each side.

In the mid-1970s, Jack's began using new signage featuring the name written on an angle in white inside a red circle; the word "Hamburgers" was dropped.