Analyses package-lock files for inconsistencies and problems.

Usage no npm install needed!

<script type="module">
  import lockInspector from 'https://cdn.skypack.dev/lock-inspector';



A tiny utility to analyze package-lock.json files for potential problems, inconsistencies and security issues.


$ npm i -D lock-inspector


$ npx lock-inspector


  -d, --dir <path>         Path to directory containing lock file. (default: ".")
  --git-compare [commit]   Output the differences between the current lock file
                           and a specific git commit.
  -v, --verbose            Verbose output
  -h, --help               output usage information


Lock files will be analysed for the following:

Insecure URIs - Any http URIs are considered unsafe and should be replaced with secure equivalents.

Duplicate versions - Multiple occurrences of a single package with different URLs is a sign of a possibly misconfigured lock file.

Manifest inconsistencies - Packages which exist in the lock file but do not match/satisfy the corresponding entry in package.json are likely misconfigured.

Registry inconsistencies - Unscoped packages in a lock file should all have the same registry. It is valid, however, to have scoped packages use a separate registry.

Git comparison mode

You can compare to a previous version of your lock file using git compare mode:

$ npx lock-inspector --git-compare master

This will attempt to use git in order to compare the lock file on disk and the original lock file in git (assuming there is a difference).