NPM Package Size Estimator

Type an npm package name; get its minified size, gzipped size, dependency count, and whether it supports tree-shaking. Data is fetched live from bundlephobia. Useful before adding a dependency, or for justifying replacing a heavy package with a lighter one.

How to use the NPM Package Size Estimator

Type a package name (with version optional: [email protected]). The tool queries bundlephobia's API and returns size data plus dependency info. If a package isn't in their cache, the first request takes a few seconds while they build it.