How to create a free non-fungible token (NFT) with OpenSea?

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⌛ Reading time: 6 minutes
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NFT, a world accessible to all

The world of non-fungible tokens (NFTs) is attracting everyone, from artists, musicians, content creators and even businesses, anyone can find a use for NFTs. At the same time, many collectors and investors are finding special interest in the acquisition of NFT.

One question remains unanswered: how to create an NFT? Today, there are many methods and platforms for creating an NFT. But sometimes it is difficult to find your way around, because there is so much on offer. Furthermore, the platforms that offer the possibility of creating an NFT are not (or are very rarely) translated into French.

We also note that several blockchains have token standards reserved for NFTs, but Ethereum is still the most used of allfar.

In this tutorial, we will learn step by step how to create an NFT from OpenSeaone of the main marketplaces that aggregates non-fungible tokens on Ethereum. Easy to use and packed with options to make life easier for NFT creators and buyers, OpenSea is considered one of the leaders in the industry.

Where OpenSea does well, is that you can create an NFT for free without paying a fee. In fact, the NFT is not transferred to the chain until the first purchase or transfer. The platform calls this the " lazy minting “This is a very interesting option to start creating NFTs.

How to create an NFT with OpenSea?

First of all, you must have an Ethereum wallet at your disposal. For practical reasons, the MetaMask wallet will be used in this tutorial. If you already have yours, you can proceed to the next step, otherwise, see our full tutorial on how to create a MetaMask portfolio.

Once you have your MetaMask wallet, go on OpenSea Click on the tab " Creation "Then on" My collections '

OpenSea My collections

You must then connect your wallet to OpenSea following the instructions provided by MetaMask. Once the connection is established, just click on the " Creation '

Create OpenSea

Before creating an NFT, you need to create a virtual collection (your showcase), which could be for example for a specific series of works. This collection will then contain the works, i.e. the NFTs.

Upload a logo for your collection, give it a name and description and click on " Creation ". Note that it is possible to change these parameters later, where other options can also be changed:

OpenSea Page Creation NFT

Wait a few seconds and then click on " Add articles “You will be redirected to your collection dashboard. Here, many parameters can be changedsuch as adding a banner to your collection, adding links to your social networks, selecting the cryptocurrencies you accept for the sale of your NFTs, and even setting the commissions that will be paid to you for each future sale of yours NFT.

Let's get down to business and create our first NFT. To do this, click on " Add a new item "and allow OpenSea to interact with your portfolio.

On the next page, you will have the option to download the metadata of your NFTsuch as an image, video or audio file, and enter its name. Below, you can also add an external link (for example, a high resolution image or a link to a personal site) and enter a description. This is what our experiment looks like:

Create an NFT

For the moment, OpenSea allows you to create only one NFT at a time (at least natively). So, if you intend to create 5 versions of the same work and you want potential buyers to know the total offer, add the number of each edition in the " Statistics ". For example, here I indicate that the NFT I am creating is the first of a series of 5 similar NFTs:

NFT statistics

It is however possible to get around this limitation, with an option provided by OpenSea, but rather discreet. You will notice that the " Supply "Is grayed out, and it is not possible to change the" 1 “Which is there. Adding " enable_supply = true If you click on the “enable_supply = true” button at the end of the URL at the top of the page and reload this page, you will be able to change the supply field.

Note that if you set the supply to 50, for example, you will have to set 50 individual sales (after creating the NFT) with the quantity set to " 1 ". Currently, it is not possible to offer 50 NFTs for sale at the same time and let buyers choose how many they want to buy.

On OpenSea, it is also possible to add items to unlockwhich can only be viewed by the owner of the NFT. For example, the creator of an NFT can include a link to a high resolution image or explain the process of retrieving a physical version of the NFT. The possibilities are endless for the creator:

Unlockable NFT content

Once you have finished setting up your NFT, click on " Creation and confirm the transaction from your MetaMask wallet ”. That's all! You have just created your first NFT is available in your collection. Here is the link of our NFT created for the occasion and how it looks on OpenSea:

NFT OpenSea

Now that your NFT exists, let's see how to sell it on OpenSea.

How to sell your NFT?

Before putting your NFT up for sale, you always have the option to change its metadata. To do this, go to your collection and click on the pencil icon in the upper right corner of the NFT. This option will obviously no longer be available once your NFT has been put up for sale.

To put your NFT up for sale, go to the public page of your NFT and simply click on " Sell ". You can choose between a fixed price sale with the option " Fixed price "Or an auction and set the starting price with the option" Highest bid ". On OpenSea, it is possible to accept 3 cryptocurrencies for the sale of your NFT, ETH, DAI and USDC. In this example, I create a direct sale of my NFT at 1 ETH:

sale-nft

Before moving on, know that Ethereum network fees apply here. If you have never sold on OpenSea, you will have to pay a fee before you can post your ad. This transaction creates a personal smart contract for your wallet, it can be quite expensive, but you only have to do it once.

However, if you decide to offer NFTs for sale in a cryptocurrency other than ETH, you will again be prompted to approve the creation of a smart contract, which results in another one-time, less expensive fee. If it turns out that the taxes are too high, wait a few hours and try to put your NFT in your stomach again when the Ethereum network is less congested, and therefore less expensive.

If you don't have ETH on your MetaMask wallet to pay these fees, you can follow our tutorial on how to buy Ether. You can then simply send these ETHs to your MetaMask address.

Finally, note thatOpenSea takes 2,5% of the price of a successful sale. The initial creator of the NFT can also take a commission on the final transaction if he so desires. For example, if OpenSea takes 2,5% and the creator takes 5%, the total commission will be 7,5% of the sale price.

Once you have completed your ad options, simply click on " Post your ad “Post your ad, pay the fee for creating your personal smart contract and that's it!

NFT List

Your NFT is now for sale on OpenSea among all other creations! Now you know that how to create an NFT and sell it on OpenSeaAll in a process that takes just a few minutes!

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