What are ERC-20 tokens? If you’ve ever explored Ethereum, you’ve probably seen names like USDT, USDC, DAI, and many other digital assets that aren’t actually ETH. These assets are often ERC-20 tokens, a standard that allows developers to create and manage fungible tokens on the Ethereum blockchain.
ERC-20 tokens have become one of the most important building blocks of the Ethereum ecosystem.
They power stablecoins, governance tokens, DeFi applications, reward systems, and many other blockchain projects.
However, there’s an important distinction that beginners often miss:
ERC-20 tokens are not the same thing as ETH.
ETH is Ethereum’s native cryptocurrency, while ERC-20 tokens are assets created and managed through smart contracts running on Ethereum.
So, how do ERC-20 tokens actually work?
Let’s break it down.
What Is an ERC-20 Token?
An ERC-20 token is a fungible digital token that follows a common set of rules on the Ethereum blockchain.
The term ERC stands for Ethereum Request for Comment.
The number 20 refers to the specific proposal that introduced this token standard.
In simple terms, ERC-20 provides developers with a common framework for creating tokens.
Instead of every project inventing completely different rules, ERC-20 defines a standard set of functions that compatible tokens should support.
As a result, wallets, exchanges, and decentralized applications can interact with many different tokens using familiar rules.
What Does “Fungible” Mean?
The word fungible might sound complicated, but the concept is simple.
Something is fungible when one unit can be exchanged for another identical unit without changing its value or identity.
For example, imagine you have a $10 bill.
If someone gives you another $10 bill, you generally don’t care which specific bill you receive.
Both represent the same amount of money.
ERC-20 tokens work in a similar way.
If you own 100 units of a particular ERC-20 token, each unit is generally interchangeable with another unit of the same token.
This is different from NFTs, where individual tokens can have unique identities and properties.
Why Was the ERC-20 Standard Created?
Before standardized token rules became popular, developers could create Ethereum tokens using different approaches.
This created compatibility problems.
Imagine every token using completely different commands.
A wallet would need custom software for every individual token.
An exchange would face the same problem.
Developers would also need to build separate integrations for each project.
ERC-20 helped solve this problem by establishing a common interface.
Because many tokens follow the same standard, Ethereum applications can interact with them more easily.
How Do ERC-20 Tokens Work?
ERC-20 tokens don’t exist as separate physical objects.
Instead, their balances and rules are managed by a smart contract deployed on Ethereum.
The smart contract keeps track of how many tokens belong to each address.
For example, imagine a token called SatoshiCoin.
Its smart contract could maintain records such as:
- Alice: 500 SatoshiCoin
- Bob: 250 SatoshiCoin
- Charlie: 100 SatoshiCoin
When Alice sends 50 tokens to Bob, the smart contract updates the balances.
After the transaction:
- Alice: 450 SatoshiCoin
- Bob: 300 SatoshiCoin
- Charlie: 100 SatoshiCoin
The blockchain records the transaction, while the token’s smart contract manages the token balances according to its programmed rules.
ERC-20 Tokens Are Powered by Smart Contracts
This is one of the most important concepts to understand.
An ERC-20 token isn’t a separate blockchain.
Instead, it is typically a smart contract operating on Ethereum.
The contract defines important rules such as:
- The token’s name.
- Its symbol.
- The total supply.
- How balances are tracked.
- How tokens can be transferred.
- Which addresses can perform certain actions.
Because these rules exist in a smart contract, users can interact with the token through Ethereum-compatible wallets and applications.
ETH vs ERC-20 Tokens
New users often confuse ETH with ERC-20 tokens.
They are related, but they are not the same.
ETH
ETH is Ethereum’s native cryptocurrency.
It is used for:
- Paying Ethereum transaction fees.
- Staking.
- Transferring value.
- Participating in the Ethereum ecosystem.
ETH exists as part of Ethereum’s core protocol.
ERC-20 Tokens
ERC-20 tokens are created through smart contracts.
They can represent many different things, including:
- Stablecoins.
- Governance rights.
- Utility within an application.
- Rewards.
- Digital assets.
- Other blockchain-based representations of value.
Therefore, there can be thousands of different ERC-20 tokens while Ethereum has only one native currency: ETH.
Popular Examples of ERC-20 Tokens
The Ethereum ecosystem contains thousands of ERC-20 tokens.
Some well-known examples include:
USDT
Tether (USDT) is a widely used stablecoin designed to maintain a value close to the US dollar.
USDT exists on multiple blockchain networks, including Ethereum as an ERC-20 token.
USDC
USD Coin (USDC) is another major stablecoin available on Ethereum.
It is designed to maintain a value close to one US dollar.
DAI
DAI is a decentralized stablecoin associated with the Maker ecosystem.
It is widely used in decentralized finance applications.
UNI
UNI is the governance token associated with Uniswap.
It allows eligible holders to participate in certain governance decisions within the Uniswap ecosystem.
LINK
LINK is the native token associated with Chainlink.
It is used within the Chainlink ecosystem and is available as an ERC-20 token on Ethereum.
What Can ERC-20 Tokens Be Used For?
ERC-20 tokens have many different applications.
Their usefulness depends on the project that creates them.
Stablecoins
Stablecoins can use the ERC-20 standard to represent blockchain-based versions of fiat-linked value.
Users can send stablecoins between Ethereum addresses without using traditional banking rails for each transfer.
Governance
Some decentralized projects issue governance tokens.
These tokens can give eligible holders voting rights over certain protocol decisions.
DeFi
ERC-20 tokens are fundamental to decentralized finance.
They can be used in:
- Lending protocols.
- Decentralized exchanges.
- Liquidity pools.
- Yield-related applications.
- Decentralized financial products.
Rewards
Projects can distribute ERC-20 tokens as rewards.
For example, a decentralized application could reward users with tokens for participating in its ecosystem.
Utility
Some projects create tokens that provide access to specific features or services.
The token’s usefulness depends entirely on the rules and design of the project.
Why Are ERC-20 Tokens So Popular?
The biggest advantage is standardization.
When a token follows the ERC-20 standard, many Ethereum applications already understand how to interact with it.
This makes integration much easier.
For example, a wallet can support multiple ERC-20 tokens without creating an entirely new system for every token.
Similarly, decentralized exchanges can interact with standardized tokens using common functions.
As a result, the ERC-20 standard helped create a large and interconnected Ethereum token ecosystem.
Are ERC-20 Tokens Stored in Your Wallet?
This is another common misunderstanding.
When you hold an ERC-20 token, the tokens aren’t physically stored inside your wallet application.
Instead, the blockchain’s token contract maintains the balance associated with your Ethereum address.
Your wallet provides an interface that lets you view and interact with those assets.
For example, if your Ethereum address controls 500 USDC, the USDC smart contract records that balance.
Your wallet reads that information and displays it to you.
This is similar to how an Ethereum wallet can display your ETH balance even though the ETH itself isn’t sitting inside the wallet software.
Do ERC-20 Tokens Need Ethereum?
Traditional ERC-20 tokens are designed specifically for Ethereum.
However, the same token names can also exist on other blockchains.
For example, USDT exists on several different networks.
Therefore, always check which blockchain you’re using before sending or receiving tokens.
Sending a token to an incompatible network or unsupported address can result in serious problems.
Why Do ERC-20 Transactions Require Gas?
ERC-20 tokens use Ethereum smart contracts.
Whenever you interact with those contracts, the Ethereum network needs to execute computational instructions.
That computation requires gas.
For example, sending an ERC-20 token usually requires more processing than a basic ETH transfer because the token’s smart contract must execute the transfer logic.
Therefore, you need ETH in your wallet to pay Ethereum network fees when interacting with ERC-20 contracts.
This is an important point for beginners:
You can hold USDC, USDT, or another ERC-20 token without holding much ETH, but you generally need some ETH to pay Ethereum mainnet transaction fees when moving those tokens.
What Happens When You Send an ERC-20 Token?
Suppose Alice wants to send 100 USDC to Bob.
The process looks roughly like this:
1. Alice Opens Her Wallet
She enters Bob’s Ethereum address and chooses USDC.
2. The Wallet Creates a Transaction
The wallet prepares a transaction that calls the USDC smart contract.
3. Alice Pays Gas
Because the transaction requires Ethereum computation, Alice pays the network fee using ETH.
4. The Smart Contract Executes
The USDC contract checks Alice’s balance and updates the relevant records.
5. Bob Receives the Tokens
The USDC balance associated with Bob’s address increases by 100 USDC.
The blockchain records the transaction.
The Important Idea to Remember
ERC-20 tokens may look like cryptocurrencies similar to ETH, but they work differently.
ETH is Ethereum’s native asset.
ERC-20 tokens are created and managed through smart contracts on Ethereum.
That distinction will make the rest of this guide much easier to understand.
The ERC-20 Functions You Should Know
Now that you understand the basic idea behind ERC-20 tokens, it’s time to look at the rules that make the standard useful.
An ERC-20 token contract contains a set of functions that wallets, exchanges, and other smart contracts can use to interact with the token.
You don’t need to be a programmer to understand them.
Think of these functions as standard commands that tell the token contract what to do.
1. totalSupply
The totalSupply function tells you how many tokens currently exist according to the token contract.
For example, imagine a project creates a token called ABC with a total supply of 1 billion tokens.
The contract can report:
Total supply = 1,000,000,000 ABC
However, the total supply doesn’t always remain fixed.
Some token contracts allow the project to create additional tokens later.
Others allow tokens to be permanently removed from circulation through a process known as burning.
Therefore, you should always check how a particular token’s supply works instead of assuming it has a fixed maximum.
2. balanceOf
The balanceOf function tells the contract how many tokens belong to a particular Ethereum address.
For example:
Alice’s address → 500 ABC
If a wallet displays that Alice owns 500 ABC, it is reading the relevant balance information from the token contract.
The wallet itself doesn’t create that balance.
The smart contract maintains the record.
3. transfer
The transfer function allows a token holder to send tokens to another address.
For example:
Alice owns 500 ABC.
She sends 100 ABC to Bob.
The contract updates the balances:
Alice → 400 ABC
Bob → 100 ABC
The transaction is then recorded on Ethereum.
4. approve
The approve function is slightly different.
It allows a token holder to give another address permission to spend a specified amount of their tokens.
This feature is extremely important in decentralized finance.
For example, imagine Alice wants to use a decentralized exchange.
She may need to approve the exchange’s smart contract to spend up to 500 USDC on her behalf.
Alice doesn’t necessarily send the 500 USDC immediately.
Instead, she gives the smart contract permission to spend up to that amount.
5. allowance
The allowance function lets the token contract check how much one address is still authorized to spend on behalf of another address.
For example:
Alice approves a smart contract to spend 500 USDC.
The smart contract uses 200 USDC.
The remaining allowance would be:
300 USDC
This system allows decentralized applications to interact with ERC-20 tokens without requiring users to manually send every token through a separate transaction.
6. transferFrom
The transferFrom function allows an approved address or smart contract to transfer tokens on behalf of a token holder.
Using our previous example:
- Alice approves a DEX to spend 500 USDC.
- Alice makes a trade worth 200 USDC.
- The DEX’s smart contract calls
transferFrom. - The token contract transfers the approved amount.
- Alice’s remaining allowance is reduced accordingly.
This combination of approve → allowance → transferFrom is fundamental to many Ethereum applications.
Why Does ERC-20 Use Standard Functions?
Imagine if every token used completely different commands.
One token might use sendTokens.
Another might use moveCoins.
Another could use pay.
Wallets and exchanges would need custom code for every token.
That would make Ethereum’s ecosystem much harder to use.
The ERC-20 standard solves this problem by providing a common interface.
As a result, applications can interact with compatible tokens using predictable functions.
How Are ERC-20 Tokens Created?
Creating an ERC-20 token usually involves deploying a smart contract to Ethereum.
A developer can write the contract manually or use established libraries and development frameworks.
The contract defines the token’s behavior.
Depending on the design, it may specify:
- Token name.
- Token symbol.
- Decimal precision.
- Initial supply.
- Transfer rules.
- Minting rules.
- Burning rules.
- Permission controls.
Once deployed, the contract becomes part of the Ethereum blockchain.
What Is Token Minting?
Minting means creating new tokens.
For example, suppose a project initially creates 1 million tokens.
If its smart contract includes a legitimate minting mechanism, it might later create additional tokens.
However, minting power can introduce significant risks.
If a small group has unlimited authority to create new tokens, they could potentially increase the supply dramatically.
Therefore, investors should understand whether a token has minting functionality and who controls it.
What Is Token Burning?
Burning means permanently removing tokens from circulation.
A token contract can send tokens to an address from which they cannot realistically be recovered.
This reduces the amount of tokens available.
Some projects use token burning as part of their economic model.
However, burning doesn’t automatically make a token valuable.
The effect depends on the token’s supply, demand, utility, and overall design.
What Are Token Decimals?
ERC-20 tokens can use decimal places to represent smaller units.
For example, a token might display:
1.25 ABC
even though the blockchain stores the amount using a smaller base unit.
Many ERC-20 tokens use 18 decimals, although the standard does not require every token to use exactly 18.
Some tokens use 6 decimals, while others use different values.
Therefore, decimal precision is another property defined by the token contract.
How Do Wallets Recognize ERC-20 Tokens?
When you add an ERC-20 token to a compatible wallet, the wallet uses information from the token contract.
It can retrieve details such as:
- Token name.
- Symbol.
- Decimal precision.
- Your token balance.
The wallet then displays the token alongside your other Ethereum assets.
However, not every token automatically appears in every wallet interface.
Sometimes you need to add the token contract address manually.
What Is a Token Contract Address?
Every ERC-20 token has a smart contract address on Ethereum.
This address identifies the specific token contract.
For example, two projects could both create tokens with the symbol ABC.
The symbol alone doesn’t prove that they’re the same asset.
The contract address provides a much more reliable way to identify the specific token.
This is why you should always verify a token’s official contract address before buying, transferring, or interacting with it.
Why Are Fake ERC-20 Tokens Possible?
The ERC-20 standard makes token creation relatively accessible.
That’s useful for legitimate developers.
Unfortunately, scammers can use the same technology.
Someone can create a token with:
- A familiar name.
- A similar symbol.
- A copied logo.
- A misleading website.
The resulting token can look almost identical to a legitimate asset.
For example, a scammer could create a fake token named “USDT” even though it has nothing to do with the legitimate Tether token.
Therefore, never identify a token solely by its name or logo.
Always verify the contract address through a trusted official source.
Why Do Some ERC-20 Transactions Cost More Gas?
Every interaction with an Ethereum smart contract requires computation.
Simple token transfers generally require a certain amount of computation.
More complicated operations can require significantly more.
For example, a decentralized exchange transaction might involve:
- Approving a token.
- Calling multiple smart contracts.
- Swapping assets.
- Updating liquidity pools.
- Recording several state changes.
Consequently, the transaction can require more gas than a basic token transfer.
Network congestion can also increase the final fee users pay because Ethereum’s gas market responds to demand.
Why Do You Need ETH to Send ERC-20 Tokens?
This is one of the most important practical details for beginners.
Suppose your wallet contains:
500 USDC
but:
0 ETH
You may have enough USDC to make a transfer, but you generally won’t have the ETH required to pay Ethereum mainnet gas.
The reason is simple.
USDC pays the token value.
ETH pays the Ethereum network fee.
Therefore, keeping a small amount of ETH available can be necessary when interacting with ERC-20 tokens on Ethereum mainnet.
ERC-20 Tokens and DeFi
ERC-20 tokens became especially important because of decentralized finance.
DeFi applications often need standardized assets that smart contracts can easily recognize and transfer.
For example, a lending protocol might accept:
- USDC
- DAI
- USDT
- WETH
- Other compatible tokens
Because these assets follow standardized interfaces, smart contracts can interact with them more easily.
This interoperability helped Ethereum develop a large ecosystem of financial applications.
ERC-20 Tokens and Decentralized Exchanges
Decentralized exchanges also rely heavily on ERC-20 tokens.
Suppose you want to swap USDC for another token.
The exchange’s smart contracts need permission to interact with your USDC.
This is why users often see an “Approve” transaction before making their first token swap.
The first transaction gives the exchange contract permission to spend the selected token.
A later transaction performs the actual swap.
Therefore, beginners may sometimes see two separate Ethereum transactions when using a decentralized exchange.
A Simple ERC-20 Transaction Example
Let’s put everything together.
Imagine Alice wants to swap 100 USDC for another token.
Step 1: Alice Connects Her Wallet
She connects her Ethereum wallet to a decentralized exchange.
Step 2: Alice Approves USDC
She approves the exchange’s smart contract to spend 100 USDC.
This transaction consumes gas.
Step 3: The Exchange Executes the Swap
Alice confirms the trade.
The exchange’s smart contracts interact with the USDC contract and other contracts involved in the trade.
Step 4: The Tokens Move
The relevant token balances are updated.
Step 5: Ethereum Records the Result
The transaction becomes part of Ethereum’s blockchain state.
This entire process relies on standardized smart contract interactions.
Why ERC-20 Became So Important
The ERC-20 standard helped turn Ethereum into more than a blockchain for transferring ETH.
It provided a common framework for creating digital assets.
Because wallets, exchanges, DeFi applications, and other smart contracts can interact with standardized tokens, developers can build new applications on top of an existing ecosystem.
This creates a network effect.
More tokens attract more applications.
More applications attract more users.
More users can encourage even more development.
That interconnected ecosystem is a major reason ERC-20 remains one of the most important token standards in crypto.
Advantages of ERC-20 Tokens
The ERC-20 standard became popular because it makes Ethereum tokens easier to create, use, and integrate.
Here are some of its biggest advantages.
1. Standardized
ERC-20 provides a common set of rules for token contracts.
Therefore, wallets, exchanges, and decentralized applications can interact with compatible tokens without creating a completely different system for every project.
2. Easy to Integrate
Because ERC-20 tokens follow a common interface, developers can integrate them into existing Ethereum applications more easily.
This has helped create a large ecosystem of wallets, exchanges, DeFi platforms, and other applications.
3. Supports Many Use Cases
ERC-20 tokens can represent many different forms of digital value.
They can function as:
- Stablecoins
- Governance tokens
- Utility tokens
- Rewards
- DeFi assets
- Project-specific currencies
As a result, the standard can support many different applications.
4. Interoperability
ERC-20 tokens can interact with many Ethereum-based applications.
For example, the same token can potentially be used in a wallet, decentralized exchange, lending protocol, and other compatible applications.
This interoperability is one of the standard’s biggest strengths.
5. Simple for Developers to Build Around
Developers don’t need to invent an entirely new token interface from scratch.
Instead, they can use established standards and libraries.
This reduces development complexity and makes it easier for different applications to communicate with the same token contracts.
Limitations of ERC-20 Tokens
Despite their popularity, ERC-20 tokens aren’t perfect.
1. Ethereum Gas Fees
ERC-20 tokens rely on Ethereum smart contracts.
Therefore, interacting with them on Ethereum mainnet requires gas.
During periods of high demand, transaction costs can become expensive.
2. Smart Contract Risks
ERC-20 tokens depend on smart contracts.
If a contract contains a serious vulnerability, users may lose funds.
Therefore, a token being ERC-20 compliant does not automatically mean the project is safe.
3. Scams Are Easy to Create
Creating a token is relatively accessible.
Unfortunately, scammers can exploit this by creating fake tokens that imitate legitimate projects.
A token’s name, logo, or ticker symbol does not prove that it is genuine.
Always verify the contract address.
4. Centralized Control
Some ERC-20 tokens give their developers or administrators significant control over the contract.
Depending on the design, an administrator might have the ability to:
- Mint new tokens.
- Pause transfers.
- Change certain parameters.
- Freeze specific addresses.
These features aren’t automatically malicious, but they can create additional risks.
5. Token Supply Can Be Complicated
Different tokens have different supply mechanisms.
Some have fixed supplies.
Others can mint additional tokens.
Some burn tokens.
Therefore, investors should understand the tokenomics before assuming that a particular token has a limited supply.
ERC-20 vs ETH: What’s the Difference?
This is one of the most important distinctions for beginners.
| Feature | ETH | ERC-20 Token |
|---|---|---|
| What is it? | Ethereum’s native asset | Token created through a smart contract |
| Native to Ethereum? | Yes | No |
| Used for gas? | Yes | Generally no |
| Can represent many different assets? | No | Yes |
| Created through a token contract? | No | Yes |
| Used for staking Ethereum? | Yes | No |
The simplest way to remember it is:
ETH belongs to Ethereum’s core protocol.
ERC-20 tokens operate through smart contracts on Ethereum.
ERC-20 vs NFTs
ERC-20 tokens are fungible.
NFTs are generally non-fungible.
That means each unit of an ERC-20 token is interchangeable with another unit of the same token.
NFTs, on the other hand, can represent unique items.
For example:
ERC-20:
100 USDC = 100 USDC
Each unit is interchangeable.
NFT:
NFT #123 ≠ NFT #456
Each NFT can have a unique identity and metadata.
This difference makes ERC-20 tokens useful for currencies and financial assets, while NFTs are useful for representing unique digital or physical items.
Are All ERC-20 Tokens Cryptocurrencies?
Technically, ERC-20 tokens are blockchain-based digital assets, and many people casually refer to them as cryptocurrencies.
However, they can serve very different purposes.
One ERC-20 token might represent a stablecoin.
Another might provide governance rights.
Another might function as an in-game currency.
Another might have almost no practical utility at all.
Therefore, you shouldn’t assume that every ERC-20 token has the same characteristics.
Common ERC-20 Token Scams
The flexibility of Ethereum makes token creation easy.
Unfortunately, scammers can take advantage of that flexibility.
Here are some common risks.
Fake Tokens
Scammers can create tokens with names and logos that resemble popular projects.
Always verify the official contract address.
Unlimited Minting
Some tokens allow authorized accounts to create additional tokens.
If the project has poor controls, the supply could increase dramatically.
Honeypot Tokens
Some malicious contracts are designed so that users can buy tokens but cannot easily sell them.
These scams can trap funds inside the contract.
Fake Airdrops
Scammers may advertise free tokens and ask users to connect their wallets to a malicious website.
The website may attempt to trick users into approving transactions or signing malicious messages.
Never connect your wallet to an unknown site simply because it promises free tokens.
How to Research an ERC-20 Token
Before buying or interacting with an unfamiliar token, check several things.
1. Verify the Contract Address
Don’t rely only on the token name or ticker.
Use the project’s official channels to find the correct contract address.
2. Check the Token Supply
Look at the total supply and understand whether new tokens can be minted.
3. Check Holder Distribution
If a small number of wallets control most of the supply, that may create additional risks.
4. Research the Smart Contract
Look for information about audits, contract permissions, and whether the code is verified.
5. Understand the Project
Ask what the token actually does.
A token shouldn’t automatically be considered valuable simply because it follows the ERC-20 standard.
Common Myths About ERC-20 Tokens
Myth 1: ERC-20 Is a Cryptocurrency
Not exactly.
ERC-20 is a token standard, not a cryptocurrency itself.
It defines common rules for fungible tokens on Ethereum.
Myth 2: Every ERC-20 Token Is Safe
False.
Anyone can create an ERC-20 token.
The standard doesn’t guarantee that the project behind a token is trustworthy.
Myth 3: ERC-20 Tokens Are Stored Inside Your Wallet
Not literally.
The token contract maintains balances associated with Ethereum addresses.
Your wallet provides an interface for viewing and interacting with those balances.
Myth 4: You Can Pay Ethereum Gas With Any ERC-20 Token
Generally, no.
On Ethereum mainnet, transaction fees are paid in ETH.
Therefore, holding only USDC, USDT, or another ERC-20 token may not be enough to complete a transaction.
Myth 5: A Token’s Name Proves Its Authenticity
False.
Anyone can create a token using a similar name or ticker.
The contract address is a much more reliable identifier.
Frequently Asked Questions
What are ERC-20 tokens?
ERC-20 tokens are fungible digital assets that follow a standardized set of rules on the Ethereum blockchain.
They are managed by smart contracts and can be used for stablecoins, governance, DeFi, rewards, and many other purposes.
Is ETH an ERC-20 token?
No.
ETH is Ethereum’s native asset.
ERC-20 tokens are created and managed through smart contracts deployed on Ethereum.
Why are ERC-20 tokens important?
ERC-20 created a common standard that allows wallets, exchanges, and decentralized applications to interact with many Ethereum tokens using familiar functions.
Do ERC-20 tokens require ETH?
You don’t need ETH simply to hold an ERC-20 token.
However, you generally need ETH to pay Ethereum network fees when transferring ERC-20 tokens or interacting with their smart contracts on Ethereum mainnet.
Can anyone create an ERC-20 token?
Technically, developers can create and deploy ERC-20 token contracts.
However, creating a token doesn’t automatically give it value, legitimacy, or utility.
Are ERC-20 tokens stored in a wallet?
The token balance is recorded by the token’s smart contract on the blockchain.
A wallet allows you to view and interact with that balance.
Are ERC-20 tokens the same as NFTs?
No.
ERC-20 tokens are fungible, while NFTs represent unique or individually identifiable assets.
Can ERC-20 tokens exist on other blockchains?
The ERC-20 standard is specifically associated with Ethereum.
However, other blockchain networks can support EVM-compatible token standards or issue representations of assets that use similar interfaces.
You should always verify which network a particular token is actually using.
Conclusion
What are ERC-20 tokens? They are standardized fungible tokens that operate through smart contracts on the Ethereum blockchain.
The ERC-20 standard created a common framework for digital assets.
Because of that standardization, wallets, exchanges, DeFi applications, and other smart contracts can interact with compatible tokens more easily.
From stablecoins such as USDC and USDT to governance and utility tokens, ERC-20 assets have become an essential part of the Ethereum ecosystem.
However, the standard itself doesn’t guarantee that a token is legitimate or valuable.
Scams, malicious contracts, centralized controls, and token supply risks can all exist.
Therefore, always research a token before interacting with it, and verify its official contract address instead of relying only on its name or logo.
Once you understand ERC-20 tokens, you’re ready to explore another major part of Ethereum’s ecosystem: NFTs.
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