Chop the pineapple, mangoes, red pepper, jalapeño, and red onion into small, bite-sized pieces so everything mixes evenly and is easy to scoop.
Add all the chopped ingredients to a large bowl along with the freshly chopped cilantro, making sure everything is evenly distributed.
Pour the fresh lime juice over the mixture and sprinkle in the salt, ensuring the liquid and seasoning reach all the ingredients.
Stir everything gently but thoroughly until the salsa is evenly coated and the flavors are well combined.
Taste the salsa and adjust salt or lime juice if needed to balance the sweetness and acidity.
Let the salsa sit for a few minutes before serving so the flavors can blend together.
Serve fresh with chips or as a topping for your favorite dishes, and store any leftovers in the refrigerator.