Open source licence check

Using open source packages in your projects is a reality of modern software development, but it's important to know what the licences that apply to those packages let you do, and what obligations they impose.

Check a whole project

Your file is read in your own browser and never uploaded or stored. We send only the name of each package in the file (which may include private packages, such as @your-company/...), to npm to look up licences, and jsDelivr to fetch the full licence text.