How to create a free NFT for sale on OpenSea

With a reputation for being popular, non-fungal signs, or easily “NFTs”, has been a constant topic in social media discussions. Articles are digital certificates, certified and stored on the blockchain, which ensures their integrity and transparency for all interested users. Although its use may be quite different, up to residential contracts, its popularity was made through digital art auctions.

However, little is said about steps to create NFT, which contributed to the delusion that the process would be difficult and unattainable. To remove this doubt, TecMundo prepared a guide to help more inexperienced users who love technology. Look!


Before you begin, it is important to mention some basic requirements for implementing the process. Considering that the user has already defined the media as false (a word derived from “mint”, something like “mint” in Portuguese), there will be:

  1. Select a platform
  2. Set your preferred blockchain
  3. Find a cryptocurrency wallet that supports the selected platform
  4. Have the rest of the crypto currency to fund the process if it is done in Ethereum. In this case, we will use the Polygon chain, which allows us to create NFT free of charge, but fees will be charged in OpenSea if sales are made.

Keeping a cryptocurrency wallet

THE crypto wallet is a digital address that can hold coins and tokens or both NFTs. Although many alternatives are accepted by niche services, the MetaMask it is often the top choice among consumers.

MetaMask digital wallet interface. Source: MetaMask

To use it, simply access its official website and download it to one of the available platforms: Android, iOS and web browsers – including Chrome, Edge, Firefox and Brave. After installation, simply open a MetaMask account and proceed to the next step.

select a platform

If the main goal of the user is sales of NFTsyou should choose a platform based on your own affluence and number of active users. Within these parameters, the key elements are OpenSea, bad and Basic, which are popular and have a desirable level of support for updates and features.

With these factors in mind, training will apply OpenSea as an example, the most popular in a niche – in it, there is a 2.5% utilization fee for each transaction performed and support for different blockchains. However, it should be noted that the process is similar in other options.

Most dominated last year, OpenSea is already facing stiff competition from LooksRare. Most dominated last year, OpenSea is already facing stiff competition from LooksRare. Source: The Block

Alternatively, a good approach for users who want to try out competing systems is to look at the fees charged and the features offered, as this will affect the remaining sales process.

Creating NFT in the Open Sea

Before creating NFT on OpenSea, it is important to “register” on your trading platform. The process is simple and requires only authorization from the user’s cryptocurrency wallet, which will be used to withdraw money spent on transactions and store purchased works.

1- Registering an account on a trading platform

To register, just click on profile icon, located in the upper right corner of the home page. Next, select your preferred wallet and approve the access. See step by step in the image below:

Adriano Camanho / ParentingSteps to creating an account on the OpenSea platform.

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

2- Creating a Collection of NFTs

After registering, the next step is to create a NFT collection, whether topic or not. To get started, hover your mouse cursor 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 lies in the final stages. It must define a percentage of commissions per creator under each transaction that refers to the collection – including the purchase and resale of goods. In addition, it is also important to inform them which blockchain trading will take place, as well as the acceptable crypto currencies.

In short, it is possible to choose networks Ethereum and Polygon on OpenSea. The first one is widely used by consumers, but it requires operating speeds that can be high and impossible – known as “Gas fee”.

On the other hand, polygon it’s free and fast, but it still does not have a large amount of origin and can affect sales speed. After all, if a signal is mined on a Polygon blockchain, it can only be sold to Polygon users.

Take a step-by-step look at the picture below:

Adriano Camanho / ParentingSteps to Create NFTs Collection.

3- Publishing NFT

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

In it, you must specify which item or set of items will be printed, as well as the title, external link and description. To continue, it is important to select the Collection to which the post will be sent, as well as some special and optional features – such as statistics, development points and content that buyers can open. These adjustments can be made intuitively and have detailed information to help the user.

To finish, just select the amount of items available, block the target and click “Create”. At the end of the process, the user will have access to the statistics page about the published NFT, which also allows its own statistics page. sale advertisement. If you wish to do so, you must select the “Sell” option, set the price in your preferred encryption and approve the transaction in a digital wallet.

See the process in the image below:

    NFT salesPrinting and listing of NFT sales.

4- Results

As a result, the user will have access to their NFT and purchase versions. To support the process, it is recommended to advertise the product through social networks and online publications. See an example, in practice, through this link.

NFT test listed on OpenSea. NFT test listed on OpenSea. Source: Adriano Camacho, OpenSea

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