Epic Games has a zero-tolerance policy for third-party software that interferes with the game. Even if a "hack" worked momentarily, your account would likely be flagged and permanently banned.
Most sites promising free Exotics are designed with one of three goals in mind: Free Fortnite Exotic Hack
You must pay for them using Gold Bars. You can farm bars quickly by opening safes, completing bounties, and looting registers. Epic Games has a zero-tolerance policy for third-party
Many "hack" downloads are actually disguised keyloggers or ransomware that can infect your device. Free Fortnite Exotic Hack
Most Exotics are sold by specific NPCs (Non-Player Characters) located around the map.