NFT Metadata Generator

Create ERC-721 and ERC-1155 compliant NFT metadata JSON files. Generate metadata for single NFTs or entire collections (1-10,000+) with custom attributes, traits, and IPFS integration. Perfect for OpenSea, Rarible, and other NFT marketplaces.

Standards Supported: ERC-721 ERC-1155 OpenSea Rarible
NFT Information
Use IPFS URLs for decentralized storage
IPFS Configuration
Attributes & Traits
JSON Preview
// Enter NFT information to generate metadata

How to Use the NFT Metadata Generator

1
Choose Generation Mode

Select "Single NFT" for individual tokens or "Collection" for bulk generation of up to 10,000 NFTs with randomized traits.

2
Enter NFT Information

Provide the NFT name, description, image URL (preferably IPFS), and external URL. All fields support standard NFT marketplace formats.

3
Add Attributes & Traits

Define custom attributes like rarity, background, accessories, etc. For collections, set up trait categories with rarity distributions.

4
Configure IPFS Integration

Set up IPFS URLs for decentralized storage. Choose from popular gateways or use custom IPFS configurations for your project.

5
Preview & Generate

Review the JSON preview in real-time. For collections, generate all metadata files automatically with proper trait distribution and rarity calculations.

6
Download Metadata

Download individual JSON files or complete collection as ZIP. All files are ERC-721/ERC-1155 compliant and ready for minting.

ERC-721 & ERC-1155 Compliance

Generate metadata following official Ethereum standards. Compatible with all major NFT marketplaces including OpenSea, Rarible, and SuperRare.

Bulk Collection Generation

Create metadata for entire NFT collections (1-10,000+ items) with automated trait distribution, rarity calculation, and batch downloads.

IPFS Integration

Built-in support for IPFS URLs and multiple gateway options. Ensure your NFTs are stored on decentralized networks for maximum permanence.

Complete Guide to NFT Metadata Generation

What is NFT Metadata and Why It Matters

NFT metadata is the backbone of every non-fungible token, containing essential information that defines your digital asset's identity. This JSON-formatted data includes the NFT's name, description, image URL, attributes, and traits that make each token unique. Without proper metadata, your NFT would be invisible to marketplaces like OpenSea, Rarible, Foundation, and SuperRare.

Our free NFT metadata generator ensures your tokens comply with industry standards including ERC-721 and ERC-1155 protocols. Whether you're creating a single NFT or launching a 10,000-piece collection, proper metadata structure is crucial for marketplace compatibility and collector appeal.

ERC-721 vs ERC-1155: Understanding Token Standards

  • ERC-721: The original NFT standard for unique, indivisible tokens. Perfect for art collections, PFP projects, and one-of-a-kind assets.
  • ERC-1155: Multi-token standard supporting both fungible and non-fungible tokens in a single contract. Ideal for gaming items, limited editions, and complex collections.

Essential Metadata Components for Success

  • Name: Unique identifier for each NFT
  • Description: Compelling narrative about your NFT
  • Image URL: Link to your NFT artwork
  • External URL: Link to project website
  • Attributes: Traits and characteristics
  • Rarity: Scarcity distribution for traits
Quick Start Checklist

Why Choose Our NFT Metadata Generator?

Lightning-Fast Collection Generation

Generate up to 10,000 NFTs in minutes with our optimized algorithm. Our tool handles complex trait combinations and rarity calculations automatically, saving you weeks of manual work.

100% Marketplace Compatible

Every JSON file follows OpenSea, Rarible, Foundation, and LooksRare standards. Your NFTs will display perfectly across all major platforms without compatibility issues.

Developer-Friendly Output

Clean, validated JSON structure that integrates seamlessly with smart contracts. Includes proper formatting for token standards and custom attribute handling.

Completely Free Forever

No subscriptions, hidden fees, or usage limits. Generate unlimited NFT metadata for personal and commercial projects without any cost.

IPFS Integration for Decentralized NFT Storage

Why IPFS is Essential for NFT Projects

InterPlanetary File System (IPFS) provides decentralized storage for your NFT images and metadata, ensuring permanent accessibility without relying on centralized servers. Unlike traditional hosting, IPFS uses content addressing, making your NFTs truly decentralized and immutable.

Pro Tip for NFT Creators

Always use IPFS URLs (ipfs://QmHash...) instead of HTTP gateways in your metadata. This ensures your NFTs remain accessible even if specific gateways go offline.

Supported IPFS Gateways

Provider Speed Reliability Best For
Pinata Fast High Professional projects
IPFS.io Medium High Testing & development
Cloudflare Fast High Global distribution
IPFS Upload Workflow
  1. 1 Upload images to IPFS
  2. 2 Get folder hash/CID
  3. 3 Configure base URL
  4. 4 Generate metadata
  5. 5 Upload metadata to IPFS

Frequently Asked Questions

Creating metadata for large collections is simple with our bulk generator:

  1. Switch to "Collection (Bulk)" mode
  2. Set your collection size (up to 10,000+)
  3. Configure base image URL with your IPFS folder
  4. Add trait categories (Background, Eyes, Mouth, etc.)
  5. Define rarity percentages for each trait value
  6. Click "Generate Collection" and download the ZIP file

The generator automatically handles trait combinations, prevents duplicates, and ensures proper rarity distribution across your entire collection.

ERC-721 metadata is designed for unique, one-of-a-kind NFTs where each token has distinct properties. This standard is perfect for:

  • PFP (Profile Picture) collections
  • Digital art pieces
  • Collectible cards
  • Virtual real estate

ERC-1155 metadata supports both fungible and non-fungible tokens in a single contract, ideal for:

  • Gaming items with multiple quantities
  • Limited edition releases
  • Multi-token collections
  • Utility tokens within NFT ecosystems

Our generator automatically formats metadata according to the standard you choose, ensuring marketplace compatibility.

OpenSea compatibility requires specific metadata formatting:

  • Image URLs: Use IPFS or HTTPS links (avoid HTTP)
  • Attributes format: Include "trait_type" and "value" pairs
  • Name uniqueness: Each NFT needs a unique name
  • Description: Keep under 1000 characters
  • External URL: Link to your project website

Our generator automatically follows OpenSea's metadata standards, including proper JSON structure and required fields. After minting, metadata updates can take 24-48 hours to refresh on OpenSea.

Absolutely! Our NFT metadata generator is completely free for both personal and commercial use. There are no licensing fees, attribution requirements, or usage restrictions.

Many successful NFT projects have used our tool to generate metadata for collections that have generated millions in trading volume. The tool supports:

  • Small indie projects (10-100 NFTs)
  • Medium collections (1,000-5,000 NFTs)
  • Large-scale launches (10,000+ NFTs)
  • Multi-phase drops and reveals

We only ask that you consider sharing our tool with other creators who might benefit from it.

Our metadata generator supports all standard NFT image formats:

  • PNG: Best for pixel art and images with transparency
  • JPG/JPEG: Ideal for photographic content
  • GIF: Perfect for animated NFTs
  • SVG: Excellent for vector-based artwork
  • WebP: Modern format with superior compression

The generator creates JSON metadata files that reference your images regardless of format. You can also specify custom file extensions in collection mode for mixed-format collections.

Compare NFT Metadata Solutions

Feature NoCostTools
(Free)		 Premium Tools
($50-200/mo)		 Custom Development
($5,000+)
Bulk Collection Generation Up to 10,000+ Varies by plan Unlimited
ERC-721/1155 Standards Full support Usually Custom
IPFS Integration Built-in Often extra Custom
Rarity Distribution Automated Advanced Complex
Setup Time Instant 1-2 days 2-8 weeks
Monthly Cost $0 $50-200 One-time

NFT Metadata Best Practices for Success

Do This

  • Use descriptive names: "Cool Cat #1234" instead of "NFT_001"
  • Optimize image sizes: 512x512 to 1024x1024 pixels for best marketplace display
  • Include project URL: Drive traffic to your official website
  • Test on testnets: Validate metadata before mainnet deployment
  • Plan trait distribution: Balance common/rare attributes for engagement

Avoid This

  • HTTP image links: Use HTTPS or IPFS for permanence
  • Duplicate names: Each NFT should have a unique identifier
  • Missing descriptions: Empty descriptions hurt marketplace appeal
  • Inconsistent formatting: Follow the same naming convention throughout
  • No trait balance: Avoid making everything ultra-rare or common

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