Skip to content

Find the true size of an npm package.


For Package Users

Get Insights

  • Get insights: Package dependencies can be deceiving—a package with one direct dependency may actually install 100 indirect dependencies. Find out everything getting installed.

Install Cost

  • Install cost: The size of node_modules can easily get out of control. Be mindful of what you're installing and keep it in check.

Bundle Cost

  • Bundle cost: Importing a large dependency to your web app can easily impact its performance. It can bloat your app, slow-down load time, and increase memory usage. Optimize for ESM packages that are tree-shakeable.

For Package Authors

Install Speed

  • Install speed: This is especially important if your package is used by CLI tools that can be loaded with npx.

Unideal Environments

  • Unideal environments: Your package may be downloaded with slow internet, on slow devices, with little storage. It may even be downloaded within the browser via WebContainers.


  • Security: Keeping dependencies to a minimum will reduce points of failure: unexpected breaking changes, malicious code, and dependency bloat.