Works with npm, yarn & pnpm

Find why any dependency
exists in your project

Trace dependency chains, discover which files use a package, and get actionable insights to optimize your bundle.

~/my-project

Features

Everything you need to understand your dependencies

🔍

See exactly how any package ended up in your node_modules, whether direct or transitive.

📁

Find which source files actually import and use a specific package in your codebase.

📊

See how much disk space a package and all its dependencies consume with --size-map.

💡

Get recommendations on whether a package can be removed or optimized.

🎨

Color-coded tree view makes it easy to understand complex dependency relationships.

🔧

JSON output mode for easy integration with your build pipelines and automation.

Installation

npx whyinstall <package-name>