Question 1

What does the NPM Package Analyzer do?

Accepted Answer

NexTool's NPM Package Analyzer parses your package.json file and provides a comprehensive audit: dependency counts, estimated bundle sizes, security risk detection, overlapping package warnings, outdated pattern identification, license analysis, and a health score. It runs 100% in your browser.

Question 2

How accurate are the bundle size estimates?

Accepted Answer

Bundle size estimates are based on known minified+gzipped sizes for hundreds of popular npm packages. They provide a useful approximation but actual sizes depend on tree-shaking, bundler configuration, and which parts of a package you import. For exact measurements, use tools like bundlephobia.com.

Question 3

Is my package.json data sent to any server?

Accepted Answer

No. The entire analysis runs client-side in your browser. Your package.json data never leaves your machine. There are no API calls, no tracking of your dependencies, and no server-side processing.

Question 4

What security risks does the analyzer detect?

Accepted Answer

The analyzer checks for packages known to have had supply chain attacks (like event-stream, ua-parser-js), intentionally corrupted packages (like colors, faker), deprecated packages with unpatched vulnerabilities (like request), and trivial packages that add unnecessary attack surface (like left-pad, is-odd).

Free NPM Package Analyzer

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