non-fungible token (NFT)

An NFT, or non-fungible token, is a one-of-a-kind entry on a blockchain that proves who owns a specific item. "Fungible" means interchangeable: one dollar or one bitcoin is exactly as good as any other, so they are fungible. "Non-fungible" means each unit is distinct and not swappable one-for-one — like a numbered concert ticket, the deed to a particular house, or an original painting. An NFT is the blockchain's way of representing exactly that kind of unique, individually identifiable thing.

Under the hood, an NFT is a token with a unique identifier recorded by a smart contract, and that contract maintains a public list of which wallet owns which item. The token usually points to the thing it represents — an image, a piece of music, a game character, an event pass — while the record of ownership itself lives openly on the chain. Anyone can verify, with certainty and without asking a company, who holds a given NFT and trace the full history of who held it before, all the way back to its creation.

NFTs matter because they give digital things something they never had: provable, transferable ownership that no platform controls. Before, a digital file could be copied endlessly with no way to say which copy was "the" owned one; an NFT settles that by making ownership a public fact rather than a database entry inside one company. That unlocks uses from digital art and collectibles to event tickets, in-game items you truly own, and membership passes you can resell.