How to create a free NFT for sale on OpenSea

They are just as popular as celebrities non-fungal tokens, or simply “NFTs”, have become a fixed topic in social media discussions. Articles are digital certificates, authenticated and stored in a blockchain, which ensures their integrity and transparency for all interested users. Although it can be used for a wide range of purposes, it has been extended to residential contracts through digital art auctions.

However, little is said Steps to create an NFT, something that contributed to the falsity because the process would be complex and inaccessible. To demystify that doubt, he has TecMundo has prepared a guide to help inexperienced users interested in technology. Review it!


Before you begin, it is important to indicate some basic requirements for the process to proceed. Considering that the user has already defined it as a medium lie (a term derived from “mint”, something like “minting” in Portuguese), will only be:

  1. Choose a platform
  2. Set a priority block chain
  3. Have a cryptocurrency wallet that supports your chosen platform
  4. If it is done in Ethereum to have a cryptocurrency balance to finance the process. In this case, we will use the Polygon blockchain, which allows us to create NFT for free, but fees will be charged if the sale is made in OpenSea.

Installing a cryptocurrency wallet

THE cryptographic portfolio is a digital address capable of holding cryptocurrencies and tokens or NFTs. Although niche services support many alternatives, Metamaskara is the main choice among users.

MetaMask digital wallet interface. Source: MetaMask

To use it, just go to its official website and download one of the supported platforms: Android, iOS and web browsers – including Chrome, Edge, Firefox and Brave. Once installed, create a MetaMask account and proceed to the next step.

choosing a platform

If it is the user’s ultimate goal Sale of NFTsyou have to choose the platform according to you liquidity and number of active users. Within these criteria, they stand out OpenSea, rare and Foundation, known and with a desirable level of support for updates and features.

Considering these factors, the tutorial will be used OpenSea As an example, the most famous niche – there is one 2.5% usage fee for each transaction made and support for different blockchains. However, it should be noted that the process is similar to the other alternatives.

Over the past year, OpenSea has already had a lot of competition from LooksRare. Over the past year, OpenSea has already had a lot of competition from LooksRare. Source: The Block

Alternatively, a good practice for users who want to test competing platforms is to check the fees charged and features offered, which will affect the rest of the sales process.

Creating an NFT in the Open Sea

Before you can create an NFT in OpenSea, you must “register” on your trading platform. The process is straightforward and requires only the permission of the user’s cryptocurrency wallet, which will be used to provide funds used in transactions and store the purchased work.

1- Register an account on the trading platform

To register, just click profile icon, is located in the upper right corner of the home page. Then select a favorite wallet and allow access. Take a look at the pictures below:

Adriano Camanho / ReproductionSteps to create an account on the OpenSea platform.

The user will be able to customize their profile on the platform with personal information, photos and presentation banners, as well as the name and link to display on their social networks.

2- Create an NFT collection

Once registered, the next step is to create one NFT collection, whether thematic or not. To get started, hover your mouse over the Profile icon and select “My Collections”, then “Create Collection”.

The process is similar to creating a profile on a social network, and the main difference is in the final steps. must define a percentage of commission for the creator under each transaction that refers to the collection, including the purchase and resale of items. It is also important to know which blockchain transactions will take place, as well as the types of cryptocurrencies accepted.

In short, there is a choice of networks Ethereum and polygon In OpenSea. The former is widely used by users, but requires a high and unfeasible operating rate, known as “Gas quota”.

On the other hand, polygon it’s free and fast, but still does not have a large adoption margin and can affect the speed of sales. After all, if the token comes out of the Polygon blockchain, it can only be sold to Polygon users.

See step-by-step pictures below:

Adriano Camanho / ReproductionSteps to create an NFT collection.

3- Publish an NFT

Once all the conditions are met, it is possible to publish an NFT. To do this, click “Create” shortcut, is located in the upper right corner of the interface. The next screen is very similar to the one found in the previous topic, but simplified.

There, you need to specify which item or set of items will be published, along with the title, external link, and description. From now on, it is necessary to select the Collection for which the publication will be directed, along with some special and optional properties, such as statistics, progress bars, and unlockable content for buyers. These adjustments can be made intuitively and have detailed descriptions to help the user.

To finish, select the number of items available, the target block, and click “Create.” At the end of the process, the user will be able to access a published NFT statistics page. list for sale. If you want to do this, you need to select the “Sell” option in a cryptocurrency where you want to set a price and allow the transaction in your digital wallet.

See the process in the pictures below:

    Sale of an NFTPublication and listing for the sale of an NFT.

4- The result

As a result, the user will have access to their NFT and purchase offers. To help with the process, it is recommended that the item be shared on social media and online publications. Check out the example, in practice, via this link.

NFT Test is listed in OpenSea. NFT Test is listed in OpenSea. Source: Adriano Camacho, OpenSea

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