When you use the “Create a Collection or item” feature in OpenSea Studio, you can’t bulk-upload multiple NFTs at once. You’ll need to create each one individually, though you can set the supply quantity to be more than 1 if you’d like to mint multiple copies of the NFT.

However, you can upload your media and metadata in bulk when you prepare a Drop. Learn more here.

At this time, we don’t support creating generative NFT collections based on specified traits and rarity.

You can use a variety of file formats for images, videos, or audio to make your NFT. We currently support JPG, PNG, GIF, SVG, and MP4 files. The maximum supported file size is 50 MB if you're uploading your media directly using OpenSea.
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Collection collaborators can modify your collection settings. Keep in mind that collection collaborators can’t add new items or edit creator earnings recipient addresses or creator earnings percentages.

To add a collection collaborator, navigate to OpenSea Studio and find the collection you’d like to update. Click Edit details. On the Details tab, click + Add collaborator and enter their wallet address or ENS name. Click Submit.

Once you’ve minted an item using OpenSea, it will exist on the blockchain you’ve chosen and be visible on that blockchain’s explorer, such as Etherscan. It should also appear by default on any other marketplace that supports your blockchain.

OpenSea does not receive any fees when you use the “Create a Collection or item” feature in OpenSea Studio.

You will, however, need to pay gas fees to deploy your smart contract and mint the NFT. Gas is paid to validators on Ethereum, not OpenSea, and is the cost to process a transaction. Gas fees will vary depending on how busy the blockchain network is, and which chain you use to launch your collection. OpenSea doesn’t control the cost of gas, nor do we receive these fees.

The maximum file size is 100MB for all media, but we recommend 10MB-15MB for images. You can add a maximum of 50 sections to your page.
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Page header (banner image/video)

Background media

Side-by-side media

Carousel (roadmap or content blocks)

Carousel (team)

This tab is a way to tell your collection’s story and share your project roadmap in exciting ways: through video, images, and text. Learn more in our help guide.

Smart contracts are the technological infrastructure that enable NFTs to exist. NFTs don’t exist without them! On OpenSea, the “collection” that an NFT belongs to is really the smart contract that powers that group of NFTs.

You can’t create an NFT without creating a collection by deploying a smart contract. However, you can choose to create a single-item collection.

If you used OpenSea’s “Create a Collection or item” feature, you can add other items to an existing collection, as shown in the screenshot below.

You won’t be able to mint additional NFTs into any existing Drops collections, other custom smart contracts, or collections created using OpenSea's former "lazy minting" tool.

When you use the “Create a Collection or item” feature, the limit of items you can add to a collection is 10,000 individual ERC-1155 NFTs. If you’re creating an ERC-1155 with multiple copies, you can create an NFT with up to 20,000 copies.

There is no cap to the number of items you can mint into Drops collections.