How to check that an Ethereum address is valid in JavaScript

In this tutorial, we are going to learn how to verify that an Ethereum address (or any EVM address) is valid in JavaScript using the Web3 library.

The first thing we need to do is install the web3 JavaScript library by running:

npm install web3

Next, we need to import the library:

import Web3 from 'web3';

Now that we have our Web3 import ready, we are going to use the isAddress utility function and pass it the address that we want to verify:

Web3.utils.isAddress(addressToVerify)

If the address is valid, this will return true otherwise it will return false .

For example, if we pass:

• "0x9F8664D057aaf67ED8a96af49F1d715A96b2b42B" which is a valid address, it will return true
• "abc" is not a valid address so it returns false

And that's it! 👏

Thanks for reading this article!