A cracker is a flat, dry baked food typically made with flour. Flavorings or seasonings, such as salt, herbs, seeds, or cheese, may be added to the dough or sprinkled on top before baking.

Crackers can be eaten on their own, but can also accompany other food items such as cheese or meat slices, fruits, dips, or soft spreads such as jam, butter, peanut butter, pâté, or mousse.

The characteristic holes found in many crackers are called "docking" holes. The holes are poked in the dough to stop overly large air pockets from forming in the cracker while baking.