The Node.js installer can be easily obtained by visiting the official Node website and accessing the downloads section. Once there, be sure to download the correct version depending on your OS and CPU (32-bit or 64-bit). As an alternative, you can also use OS-specific package managers to install this. Depending on the OS you are using, just jump into the specific subsection to get more details on the steps to be followed.
You can jump into the Node.js download sections by following this link: https://nodejs.org/en/download.
