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NFT Metadata Generator

ERC-721 + ERC-1155, traits builder, CSV bulk, IPFS-ready.

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NFT data

Traits (2)

Bulk import from CSV (10K collection)

JSON metadata (ERC-721)

{
  "name": "Cool Cat #1",
  "description": "A unique cool cat from the collection.",
  "image": "ipfs://QmYourCidHere/1.png",
  "attributes": [
    {
      "trait_type": "Color",
      "value": "Orange"
    },
    {
      "trait_type": "Rarity",
      "value": "Common"
    }
  ]
}
Metadata, traits, descriptions never leave your browser.
2
Standards
CSV
Bulk import
Unlimited
Free uses per day
Browser
Runs in

What is the NFT Metadata Generator?

An NFT metadata generator produces the JSON file that OpenSea, Magic Eden, Blur, and other marketplaces read to display your token. It contains name, description, image URL, and attributes (traits like Color, Rarity, Strength). Without proper metadata, your NFT shows as a generic image with no traits and no marketplace search.

This generator supports ERC-721 (one-of-one or numbered series) and ERC-1155 (semi-fungible) standards, with a CSV bulk-import path for 10K collections, and IPFS-ready URL hints. All in your browser -your trait data and descriptions stay private.

How it works

Step 1
Pick standard
ERC-721 for one-off / numbered NFTs. ERC-1155 for editions or semi-fungible.
Step 2
Fill traits
Add trait_type → value pairs. Number, percentage, date display types supported.
Step 3
Export
Download single JSON or batch ZIP from CSV. IPFS upload instructions included.

Features

ERC-721 + ERC-1155
Both standards. ERC-1155 includes decimals + properties fields.
Traits builder
trait_type / value pairs with display types (number, percentage, date).
CSV bulk import
10K collection? Paste CSV, get individual JSONs per row.
IPFS-ready hints
URL format examples + step-by-step IPFS pinning instructions.
Animation URL
animation_url for video/audio/3D NFTs. Static image stays as preview.
Background color
background_color trait shows behind the NFT on OpenSea.
Multi-marketplace
OpenSea, Magic Eden, Blur, Rarible all read the same metadata schema.
Browser only
Trait data, descriptions, your art metadata stays on your laptop.

Who uses it

NFT artists
Single-token releases. Polish metadata before mint.
Collection devs
10K PFP collections via CSV import.
Game studios
ERC-1155 for in-game items with properties payload.
Web3 learners
Seeing what real NFT metadata JSON looks like.

Frequently asked questions

Is the NFT metadata generator free?▾

Yes. Unlimited use, no signup. OpenSea's own metadata standard is the schema; we generate compliant JSON for free.

Does it support ERC-721 and ERC-1155?▾

Yes. Toggle the standard. ERC-721 metadata has name/description/image/attributes. ERC-1155 adds decimals and properties fields.

What is IPFS for?▾

IPFS pins your image and metadata to a content-addressed network so the NFT can't be lost when your hosting goes down. Without IPFS, an NFT's image disappears if you stop paying for hosting. Use pinata.cloud, nft.storage, or web3.storage.

Can I batch generate metadata for a 10K collection?▾

Yes via CSV import. Each row becomes a metadata JSON. Columns: name, description, image, trait_X for each trait. Download the bundled JSON files.

What's the difference between trait_type and properties?▾

trait_type appears in OpenSea's attribute filter sidebar (every NFT in your collection groupable by Color, Rarity, etc.). properties is a raw object for app-specific data the marketplace doesn't filter on.

How do I link to my contract on-chain?▾

Set tokenURI() to ipfs://<METADATA_CID>/{id}.json (where {id} is replaced by the actual token ID by the contract). For ERC-1155, use the same pattern with id substitution.

What image formats work?▾

PNG, JPEG, GIF, WebP, SVG, MP4 (for animation_url). Most marketplaces prefer PNG/JPEG for the main image and MP4/WebM for animated NFTs.

Does it support animated NFTs?▾

Yes via the animation_url field. Set image to a static preview (JPEG/PNG) and animation_url to your MP4/WebM/GLB. Marketplaces show the animation in detail view.

Is my data sent anywhere?▾

No. The generator runs in your browser. Your NFT data, descriptions, traits stay on your laptop. We never see them.

Can I generate the smart contract too?▾

Not in this tool. Use the Token Contract Generator for ERC-721/1155 Solidity scaffolding with OpenZeppelin imports.

Generate NFT metadata

ERC-721 + ERC-1155, CSV bulk, IPFS-ready. Free unlimited.

Open the generator

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Built and reviewed bySaqib Zahoor, WeboTech Studio
Last updated:

The NFT Metadata Generator page is built, reviewed, and maintained by the Molixa team. We use the tool we ship and update the docs when the behavior changes.

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