# ERC-721

> The Ethereum standard for non-fungible tokens (NFTs).

Canonical URL: https://fudfomo.co/glossary/erc-721
Source: What The Block! Dictionary v1.0 (last updated 2026-04-25), browsable at https://wtb.fudfomo.co.

## Definition

ERC-721 is the original standard for NFTs on Ethereum. Each token in an ERC-721 contract has a unique ID and its own owner.

The standard defines how to transfer, mint, and check ownership of these unique tokens. It is what underpins most digital art, profile picture collections, and on-chain memberships in the NFT world.

## Related terms

- [NFT](https://fudfomo.co/glossary/nft): A token that represents ownership of a unique item, like a piece of digital art or a ticket.
- [Ethereum](https://fudfomo.co/glossary/ethereum): A blockchain that lets developers build apps and issue tokens. Often called a programmable money platform.
- [Smart Contract](https://fudfomo.co/glossary/smart-contract): A program that runs on a blockchain and does what it says, automatically.
- [Token](https://fudfomo.co/glossary/token): A unit of value created on top of an existing blockchain like Ethereum.

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