NFT Metadata Generator

Build ERC-721/ERC-1155 metadata JSON with OpenSea standard support. Add traits, export files, generate batches.

Basic Fields

Name *

Description *

Image URL *

External URL (optional)

Animation URL (optional)

Background Color (hex, optional)

Attributes / Traits

Batch Mode

Generate multiple files (numbered sequentially)

JSON Preview

{
  "name": "",
  "description": "",
  "image": "",
  "attributes": []
}

Validation

⚠ Name is required

⚠ Description is required

⚠ Image URL is required

Solidity: tokenURI Example

function tokenURI(uint256 tokenId) 
    public view returns (string memory) 
{
    // Returns: ipfs://Qm.../1.json
    return string(abi.encodePacked(
        baseURI, 
        tokenId.toString(),
        ".json"
    ));
}

Standards Reference

• ERC-721: Unique token metadata

• ERC-1155: Same structure per token type

• OpenSea: Standard trait display types

OpenSea Metadata Docs →