What it is
ERC-721, or Ethereum Request for Comment 721, is a technical standard for smart contracts on the Ethereum blockchain that enables the creation of unique, non-fungible tokens (NFTs). Unlike ERC-20 tokens, each ERC-721 token is distinct and has a unique identifier, meaning no two tokens are exactly alike or interchangeable. This standard defines functions for ownership tracking, transfer, and ensuring the uniqueness of each digital asset.
ERC-721 tokens are the backbone of the NFT market, representing digital art, collectibles, gaming items, and other unique digital assets. Their adoption has fueled the growth of platforms for buying, selling, and displaying NFTs. News frequently features record-breaking NFT sales, new collections, and their integration into metaverse projects. Retail investors encounter ERC-721 tokens when participating in the NFT market, requiring knowledge of how these unique digital assets are managed and transferred.
Why it matters
ERC-721 tokens are NFTs; understanding this standard is essential for buying, selling, or collecting unique digital assets.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice