NORTHFIELD, Ill.—Kraft Foods has expanded its self-imposed restrictions on exposing children to junk food marketing by promising to remove some sugary, salty and fatty foods messages from websites aimed at children. The move comes 10 months after Kraft broke ranks with other U.S. food makers by committing to stop advertising certain junk foods on TV to kids under 12.

Kraft Foods has also revised its plans for smaller portions, saying it would offer a broad range of portion sizes and provide nutrition information for entire packages rather than individual portions. The largest North American food maker recently disclosed its decisions in a progress report on its health and wellness initiatives announced last July.