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NFT metadata is a critical component of NFT projects & blockchain technology. It is used to track and identify the ownership of digital assets. This blog post will explore NFT Metadata and how it is used in blockchain technology. We will also discuss some of the benefits of using NFT Metadata.

What Are NFTs and Smart Contracts?

NFT Token

Non-fungible tokens, more commonly known as NFTs, are a type of cryptocurrency that represents ownership of a digital asset. Unlike Bitcoin or Ethereum, which are fungible or interchangeable, NFTs are unique and cannot be replaced by another token. This makes them ideal for representing art, music, or virtual real estate items. While NFTs are still a relatively new technology, they have already begun to gain traction in the online community.

In particular, they have become popular among content creators who can now sell their work as digital collectables. For example, an artist could sell an NFT of their latest painting, and the buyer would receive a token that represents ownership of the work. With the help of blockchain technology, NFTs can be bought, sold, or traded via exchanges.

Smart Contract

A self-executing contract (known as a smart contract) written with coding outlines the terms of the agreement between buyer and seller. The code and the agreements exist across a decentralized network and are enforced by the network itself. Smart contracts allow for trusted transactions and agreements to be carried out among disparate, anonymous parties without needing a central authority, legal system, or external enforcement mechanism.

So, if you were to purchase an NFT (non-fungible token) as per a smart contract, the token would be stored on the blockchain with a unique identifier. The smart contract code would state the conditions under which you could resell or transfer ownership of the NFT. The NFT is stored on a decentralized network, so it cannot be tampered with or altered by a third party.

What is NFT Metadata?

An NFT’s metadata is used to describe the additional properties and characteristics of the digital asset. This can include the date and time the asset was created, the creator’s name and contact information, a description of the asset, and keywords that can be used to search for the asset. Metadata is stored in a blockchain ledger, allowing NFT owners to track and manage their assets.

The metadata allows an NFT creator to produce something unique and impossible to duplicate. As a result, NFTs with rich metadata are highly sought after by collectors and investors.

Where is NFT metadata stored?

NFTs are stored on the IPFS (interplanetary file system), a decentralized network of computers that use the same protocol to communicate. The system is designed to be distributed and scalable to handle many users and NFTs. The main advantage of using the interplanetary file system is that it is resistant to censorship and data loss. This is because the data is spread across many different nodes in the network, and any single node can be taken offline without affecting the others.
The downside of using the interplanetary file system is that it is not as fast or efficient as other storage systems. However, this tradeoff is worth it for many users who value censorship resistance and data security.

This is what makes NFTs so unique and valuable: they are unable to be replicated or modified because their data is stored on the blockchain. When you buy an NFT, you are purchasing a token that represents the underlying data. The information itself is immutable and held securely on the Ethereum blockchain. This makes NFTs a secure way to buy and sell digital assets.

Storing NFTs Off-Chain

When you store your NFTs off-chain, you’re entrusting them to a third-party service, such as a cloud storage provider, e.g. Google Drive or AWS. This service is responsible for keeping track of your NFTs and ensuring that they remain accessible to you. You should be aware there are many risks associated with storing NFTs off-chain. First, if the service goes out of business, your NFTs could be lost forever. Second, the service could be hacked, and your NFTs could be stolen.
Finally, the service could make your NFTs inaccessible, preventing you from selling or transferring them. As a result, it’s essential to weigh the risks and benefits of storing your NFTs off-chain before deciding.

JSON data and NFT Metadata

To mint an NFT, you will need to create a JSON file containing the essential NFT metadata describing what the token represents.

The Ethereum network is set to receive a JSON file standard for encoding metadata, making it easier for non-fungible tokens (NFTs) to interact with smart contracts. The Ethereum NFT standard, known as ERC 721, allows developers to store JSON metadata on the Ethereum blockchain.

This is particularly useful for NFTs, which often need to include additional information such as artist name, description of the NFT or licensing information. The JSON standard makes it easier for NFTs to interoperate with JSON-based systems, such as the web3 API. It also makes it possible to query and filter NFTs based on their metadata.

When creating NFT metadata, a few critical pieces of information should be included in the JSON file. First, you will need to have a unique identifier for the NFT. This can be a URL or other unique string. Next, you will need to add some basic metadata about the NFT, including its title, description, and keywords.

Finally, you will want to specify the file format for the NFT itself. This will ensure that it can be appropriately displayed and interacted with by users. By including these essential pieces of information, you can create a complete and valuable JSON file for your NFTs.

How to edit the Metadata of an NFT that has already been minted

If you have an NFT that you’ve already minted and made a mistake when submitting, you may want to edit its metadata. When you mint an NFT, you’re creating a digital asset that allows you to hold, transfer, and trade data securely.

The metadata is what makes an NFT unique and valuable. The reason why it’s so difficult to edit metadata is because the data is stored on a blockchain network. And once information is stored on the blockchain, it’s complicated to change with being an expert coder, as detailed here:

If the metadata were easily changed of an NFT at a later stage, there would be little trust in the utility of an NFT when purchased, as this could be altered later, reducing the value significantly.


In the world of non-fungible tokens or NFTs, once an item is created, it can be challenging to change. This is because NFTs are meant to be unique and immutable or unable to be changed. However, there are some situation where you may want to edit your NFT.

For example, you may want to add new properties or update the image. If you minted your NFT on OpenSea, you could easily edit your item by clicking the Edit button. Keep in mind that you won’t be able to edit your NFT after it’s been sold. So if you’re looking to make changes, it’s best to do it sooner rather than later.

What does ‘freezing metadata’ do?

NFTs have been heralded as a way to help artists protect their work from piracy and unauthorized changes. But what happens if the NFT itself is changed or lost? One solution is to “freeze” the metadata associated with an NFT, which locks it in place. This prevents anyone from making changes to the NFT without the artist’s permission. In addition, freezing the metadata helps to ensure that the NFT can never be lost or stolen.

As a result, freezing your NFT metadata is an excellent way to protect your work from unauthorized changes or loss.

What is the Solana Metadata standard?

The Solana metadata standard Metaplex is a decentralized system designed to provide a universal way of labelling data. The Metaplex consists of a network of nodes, each storing metadata about a particular data type. When users want to label a piece of data, they send a request to Metaplex. Metaplex then compares the data to all the metadata stored in its network and returns the labels that match. This system has several advantages over traditional methods of data labelling.

First, it is highly scalable; the more nodes added to the network, the more metadata can be stored. Second, it is very efficient; because Metaplex only needs to compare data to metadata relevant to its data type, it can quickly find the labels that match. Finally, it is decentralized; anyone can add a node to the network, and no single entity has control over Metaplex.


In conclusion, NFT metadata is a way to store data about your NFTs on the blockchain. This data can include information like the date and time of creation, the artist or creator’s name, and even a description of the NFT. By storing this information on the blockchain, you can ensure that it will never be lost or tampered with.

You can also use NFT data to create unique experiences for your fans or customers, such as exclusive artwork or behind-the-scenes videos.

Would you like to know more regarding our NFT development services? Click here.

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