Fresh pineapple is quite perishable. It bruises easily in spite of its seemingly armored exterior and will ferment if kept at room temperature for too long. If stored at room temperature, use within two days.

Storing at room temperature will increase the acidity level of the pineapple, but will not improve sweetness. You can extend the lifespan to three to five days by refrigerating the whole pineapple in a perforated plastic bag.

Once trimmed and cut, be sure the pineapple is covered in an airtight container. Refrigerate and use within five to seven days. Let the fruit return to room temperature before eating to improve flavor.

Freshly cut pineapple can be frozen in juice or syrup, but it will lose some flavor. Peel, core and cut into chunks. Place in airtight plastic bags or covered containers with their natural juice and freeze up to 6 months.

Canned pineapple can be stored up to one year on the shelf in a cool, dry place. Leftover canned pineapple should be refrigerated in its juice in a covered container and consumed within a week.