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What is npm?
npm is a free tool and online library for downloading and installing JavaScript software.
- Category GitHub & code
- Updated 20 Oct 2026
npm, explained simply
npm stands for Node Package Manager. It comes with Node.js.
You type a short command, and npm fetches a tool and the other pieces it needs.
For example, an install guide may tell you to run npm install, which downloads everything for a project.
Only install packages from makers you trust, since anyone can publish one.
On ITG Now, our free tool guides show the exact npm command when a tool needs it, and explain what it does.
Related terms
Node.jsPackage managerDependencyCLISupply chain attackTyposquatting
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Questions people ask about npm
Is npm free?
Yes, using npm to install public packages is free. Paid plans exist for private packages.
npm vs pip: what is the difference?
npm installs JavaScript tools. pip installs Python tools.
Is npm safe?
Mostly, but attackers sometimes publish bad packages with look-alike names. Check the name before you install.