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NFT (Non-Fungible Token)

In simple terms

An NFT is a digital certificate of ownership that proves you own a unique item online, like a digital painting or collectible. Think of it like a signed autograph on a digital file—it shows that specific version belongs to you.

Definition

A unique digital asset that represents ownership of a specific item like art, music, or collectibles.

In depth

An NFT is a cryptographic token recorded on a blockchain that represents ownership of a unique digital asset, with metadata stored either on-chain or via IPFS/external URIs. Unlike fungible tokens (e.g., Bitcoin), each NFT has a distinct identifier and cannot be exchanged 1:1 for another. The blockchain's consensus mechanism and validators ensure the immutability of ownership records, while smart contracts define the token's properties and enable transfers. Most NFTs follow standards like ERC-721 (Ethereum) that specify how ownership, transfers, and metadata are encoded at the protocol level.

How does NFT (Non-Fungible Token) work?

An NFT is an entry in a smart contract that assigns a unique token ID to one wallet address. When a creator mints, the contract records that ID and its owner, plus a pointer, usually a URL or an IPFS hash, to metadata describing the item and where its image lives. Transfers update the owner field on-chain. Marketplaces read that record to display who holds what, and a sale is a transaction swapping payment for the token ID. The artwork itself normally sits off-chain, so if that hosting disappears, the token remains but what it points at may not.

An example

A creator mints 100 numbered artworks and lists them at 0.05 ETH each. Using illustrative numbers, a buyer pays 0.05 ETH plus a network fee, and the contract transfers token number 37 to their wallet. The contract may specify a 5% creator royalty on resales, though many marketplaces do not enforce it. Any later resale depends entirely on another person choosing to buy, and there may be no buyer at all.

Figures are illustrative only.

What beginners get wrong

  • Owning the token does not grant copyright to the image; rights depend on the license the creator wrote, and often no rights transfer at all.
  • Signing a listing prompt from an unfamiliar marketplace is a common way wallets are drained, because the signature can approve transfers instead.
  • Ignoring where the image is hosted, since metadata on a single private server can vanish and leave a token pointing at nothing.
  • Treating a collection's floor price as cash value overlooks that thin markets can have no active buyers at that level, or any level.

Related terms

Part of

What are stablecoins, NFTs and tokenized assets? — the subject page for stablecoins and tokenization, with all 4 of its definitions in one place.

Educational only — not financial advice.