Ripeness is the measure of whether or not the fruit is ready to eat, while deterioration measures if the fruit has begun to break down. Freezing Fresh Pineapple. Fresh, uncut pineapple can sit out at room temperature for two or three days, and although it doesn't ripen or get any sweeter, its fruit may get a little softer and juicier if its rind is still green. Step Two: Store pineapple with the help of a dehydrator. Fresh pineapple will keep in your refrigerator for two to four days after being cut. Know what you’re looking for. In the freezer: Freezing pineapple is a great way to preserve this sweet fruit longer. Properly stored, cut pineapple will last for 3 to 4 days … When choosing a pineapple, there are two qualifications that you should keep in mind: ripeness and deterioration. How long does cut pineapple last in the fridge? Sliced pineapple should be stored in an airtight container to keep it fresh for around four days. Step-by-Step Guide to Storing Pineapple Step One: Freeze pineapples. You will give it an extra three days if you store it in the fridge instead, preferably covered in a perforated plastic bag. The trick to doing it properly is to freeze it within one to two days of buying it. It lasts more like four to five days in the fridge, but this slows the softening. To maximize the shelf life of cut pineapple, wrap tightly with plastic wrap or aluminum foil, or place in covered container or resealable plastic bag and refrigerate. Use a very sharp knife so the blade will be less likely to slip off the pineapple's tough... Refrigerating Fresh Pineapple. How to Store Pineapple Peeling and Coring Pineapple.