---
# System prepended metadata

title: NFT Metadata JSON Schema
tags: [nft, blockchain]

---

# NFT Metadata JSON Schema

[TOC]

###### tags: `blockchain` `nft`

---

## ERC-721 Metadata JSON Schema

```json
{
	"title": "Asset Metadata",
	"type": "object",
	"properties": {
		"name": {
			"type": "string",
			"description": "Identifies the asset to which this NFT represents"
		},
		"description": {
			"type": "string",
			"description": "Describes the asset to which this NFT represents"
		},
		"image": {
			"type": "string",
			"description": "A URI pointing to a resource with mime type image/* representing the asset to which this NFT represents. Consider making any images at a width between 320 and 1080 pixels and aspect ratio between 1.91:1 and 4:5 inclusive."
		}
	}
}
```

- [Source](https://eips.ethereum.org/EIPS/eip-721)

## ERC-1155 Metadata URI JSON Schema

```json
{
	"title": "Token Metadata",
	"type": "object",
	"properties": {
		"name": {
			"type": "string",
			"description": "Identifies the asset to which this token represents"
		},
		"decimals": {
			"type": "integer",
			"description": "The number of decimal places that the token amount should display - e.g. 18, means to divide the token amount by 1000000000000000000 to get its user representation."
		},
		"description": {
			"type": "string",
			"description": "Describes the asset to which this token represents"
		},
		"image": {
			"type": "string",
			"description": "A URI pointing to a resource with mime type image/* representing the asset to which this token represents. Consider making any images at a width between 320 and 1080 pixels and aspect ratio between 1.91:1 and 4:5 inclusive."
		},
		"properties": {
			"type": "object",
			"description": "Arbitrary properties. Values may be strings, numbers, object or arrays."
		}
	}
}
```

- [Source](https://eips.ethereum.org/EIPS/eip-1155)
