package.json Validator & Auditor
Inspect package.json files for duplicate dependencies, unpinned wildcard versions, missing project metadata, and npm registry hygiene.
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Frequently Asked Questions
Why should I specify engines in package.json?
Specifying engines: { "node": ">=20.0.0" } ensures that team members and CI/CD environments execute with compatible runtime versions, avoiding obscure syntax and module errors.
What is the risk of using wildcard (*) dependencies?
Using * pulls the latest release on every fresh install, exposing builds to supply chain attacks or accidental breaking API changes.
Why is the license field required for publishing?
npm requires a valid SPDX license identifier (such as MIT, Apache-2.0, or UNLICENSED) so consumers legally understand terms of use.
Is my file uploaded anywhere?
No. 100% of validation and dependency auditing happens locally in your browser.