Strawberry — Food safety facts
Safe to share · Cats · full breakdown on the linked food page
Safe — wash and slice (tops removed). Natural sugars, so keep it a treat.
Short answer
Yes, a small piece of strawberry with the leaf is safe, but it's best to remove the leafy top. The leaves aren't toxic, but they can be a bit tough and may cause mild stomach upset. Wash the fruit thoroughly, cut it up, and only offer a tiny amount as a rare treat. If your cat eats the leaves and seems uncomfortable later, just check in with your own vet.