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/ NFT Metadata Validator

NFT Metadata JSON

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NFT Metadata Validator

Validate NFT metadata against OpenSea and ERC standards

■ 01

What are NFT Metadata Standards?

NFT metadata standards are specifications that define how non-fungible token information should be structured and stored. These standards, defined by ERC-721 and enhanced by OpenSea, ensure that NFT marketplaces and wal…

■ 02

How does it work?

Validation Process The validator checks your NFT metadata against ERC-721 and OpenSea standards. It verifies required fields (name, description, image), validates optional fields (attributes, animation_url, external_url…

■ 03

Sample Cases

Covers BAYC #8650 Metadata, CryptoPunks #5217 Metadata, and Full Metadata with Animation so you can compare common inputs and outputs quickly.

/ Code

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/ Integration

Source code from the selected tool, shown here alongside the live version on the right.

/ Source Code

TypeScript

typescript

// Validate NFT metadata against ERC-721/OpenSea standards

interface NFTMetadata {
  name: string;
  description: string;
  image: string;
  attributes?: Array<{
    trait_type: string;
    value: string | number;
    display_type?: string;