Crostini (lit. 'little crusts'; sg.: crostino) are an Italian appetizer (antipasto) consisting of small slices of grilled or toasted bread and toppings. The toppings may include a variety of different cheeses, meats, vegetables, and condiments, or may be presented more simply with a brush of olive oil and herbs or a sauce.

Along with bruschetta, crostini are thought to have originated in medieval times, when it was typical for peasants to eat their meals on slices of bread instead of using ceramics.

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