Britain's fourth biggest grocer William Morrison said it would launch an online food offer by January 2014 to better compete with rivals.
The news came as it posted its first fall in full-year profits for six years.
Unlike the other grocers that make up Britain's so called "big four" - market leader Tesco, Wal-Mart's Asda and J Sainsbury - Morrisons currently does not have a website for the home delivery of food.
Morrisons is in talks with British online grocer Ocado which could lead to some form of partnership deal.
The group made an underlying pretax profit of £901m sterling in the year to February 3. That compared with analysts' consensus forecast of about £902m but was down from £935m made in the previous year.
The company did, however, raise its dividend for the year by 10% to 11.8 pence.