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Libraries.io

Free · Open Source · Package Discovery

PackagesDependencies
★★★★★ Editor score 4.9 / 5
📂 Open Source
🌐 Web-based
🗓 Updated June 3, 2026

What is Libraries.io?

Libraries.io is a directory that helps you find and understand open-source software packages. It tracks packages across many different programming language ecosystems, like npm for JavaScript, PyPI for Python, and Maven Central for Java.

What Makes Libraries.io Stand Out

  • It shows you not just the package itself, but also its dependencies and which other projects depend on it.
  • You can easily compare versions and see release histories for packages.
  • It provides insights into the health and activity of open-source projects.

Who Should Use Libraries.io?

Developers and project managers who work with open-source software will find Libraries.io useful. It's particularly helpful when you're choosing libraries for a new project or need to audit the dependencies in an existing one.

Is Libraries.io Free?

Yes, Libraries.io is free to use for its core features. They also offer paid plans for advanced features and higher usage limits if you need them.

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