Metadata Standard
A spec for how NFT metadata is structured, such as the ERC-721 metadata extension.
A spec for how NFT metadata is structured, such as the ERC-721 metadata extension.
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Sep 2026 · Verheidsscore: 50%
What is Metadata Standard?
A spec for how NFT metadata is structured, such as the ERC-721 metadata extension.
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- Authority Node
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ERC-721/ERC-1155 tokens point to metadata via a tokenURI, typically a JSON file following the OpenSea/ERC-721 metadata schema: name, description, image, attributes, and more. Metadata may be stored on centralized servers, IPFS, Arweave, or
Metadata standards are why NFTs work across marketplaces, wallets, and games — a token minted anywhere displays anywhere. Storage choices matter: centralized metadata can be changed or lost ("rug pulls" on mutable metadata), so immutable or
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1. What Is a Metadata Standard
A metadata standard is a specification for how token metadata — name, image, attributes, description — is structured and stored, so wallets and marketplaces can interpret any token consistently.
2. How It Works
ERC-721/ERC-1155 tokens point to metadata via a tokenURI, typically a JSON file following the OpenSea/ERC-721 metadata schema: name, description, image, attributes, and more. Metadata may be stored on centralized servers, IPFS, Arweave, or on-chain. Standards ensure interoperability: any marketplace can render any NFT's metadata uniformly.
3. Why It Matters
Metadata standards are why NFTs work across marketplaces, wallets, and games — a token minted anywhere displays anywhere. Storage choices matter: centralized metadata can be changed or lost ("rug pulls" on mutable metadata), so immutable or on-chain metadata is valued for provenance.
4. Key Facts
- tokenURI links to the metadata JSON
- ERC-721 metadata schema includes image, name, attributes
- On-chain metadata (e.g., fully on-chain art) maximizes immutability
- IPFS/Arweave provide decentralized metadata hosting
5. Related Concepts
- nft
- nft-metadata
- nft-collection
- provenance
Frequently Asked Questions
What is Metadata Standard?
A spec for how NFT metadata is structured, such as the ERC-721 metadata extension.
How does Metadata Standard work?
A metadata standard is a specification for how token metadata — name, image, attributes, description — is structured and stored, so wallets and marketplaces can interpret any token consistently. ERC-721/ERC-1155 tokens point to metadata via a tokenURI, typically a JSON file following the OpenSea/ER
Why does Metadata Standard matter in Web3?
- nft-metadata - nft-collection - provenance