Method, systems, and apparatus for integrated online and offline sales management. A system manages both offline and online transactions and inventory in an integrated environment. An offline transaction is a sale at a point of sale (POS) system, e.g., at a typical “brick and mortar shop” physical store. An online transaction is a sale using an online store, e.g., an online shopping cart and checkout system accessed by a web browser or other application. An online store can be converted to offline store, and vice versa. An inventory management system can receive an input from a merchant device of merchant designating an item carried by the merchant as an item to be sold at the physical store, at the online store, or both. The inventory management system can modify a record of the item to respond to the input.