Whole, uncut pineapple can be stored at room temperature for 2-5 days. Keeping it on the counter allows it to continue ripening. For longer shelf life, refrigerate the whole pineapple. It will stay fresh for up to 5-7 days in the fridge. Cut pineapple should always be refrigerated in an airtight container. This prevents oxidation and preserves the flavor. Cover the exposed pineapple flesh with plastic wrap if not stored in a sealed container. Press the wrap gently against the surface. Store cut pineapple chunks in their own juices in the fridge to prevent drying out. Canned pineapple juice works too. Frozen pineapple chunks maintain their texture and taste if stored in airtight freezer bags for 2-3 months. Dehydrate it!﻿ Proper refrigeration is key to maintaining the flavor and extending the shelf life of fresh-cut pineapple. Whole pineapple can stay at room temp for a few days before needing fridge storage.