Yes, dogs can eat pineapple! Many sources say pineapple is safe for dogs, if the theme of small amounts is followed it’s probably fine, but pineapple does have a lot of sugar in it.
There are some human foods that are OK to offer to our four legged friends as a small treat, and others that are downright dangerous. When in doubt, run the question past your veterinarian, but here are a few rough guidelines to start the conversation.