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Package.json Generator

Generate package.json files interactively online. Free Node.js package.json generator with fields for dependencies, scripts, metadata, and license selection.

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Package Info

Scripts

Dependencies

No entries yet. Click "Add" to add one.

Dev Dependencies

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Engines

{
  "version": "1.0.0",
  "main": "index.js",
  "type": "commonjs",
  "license": "MIT",
  "scripts": {
    "start": "node index.js",
    "test": "jest"
  }
}

About Package.json Generator

Interactively build a valid package.json for your Node.js project. Fill in package metadata, add scripts with common presets, manage dependencies and devDependencies, configure engines, and download the result. Only non-empty fields are included in the output.

How to Use Package.json Generator

1

Enter project basics

Fill in the project name in lowercase without spaces, the starting version (1.0.0 is the conventional default), a short description, and the author. The generator wires these into the standard package.json fields automatically.

2

Add dependencies

Separate runtime dependencies (the libraries your code needs to actually run) from devDependencies (tools used only during development). The generator can suggest the common picks like TypeScript, ESLint, and Prettier so you don't have to type them by hand.

3

Configure scripts

Set up the npm scripts you'll run via 'npm run X'. The standard set is dev for the development server, build for the production bundle, start to run the built output, test to run the test suite, and lint for static checks. Add any project-specific scripts here too.

4

Generate and download

The output is a complete package.json ready to drop at the root of a new project. Copy it to the clipboard or download it directly, then run 'npm install' in the project folder to fetch all the listed dependencies.

When to Use Package.json Generator

New project setup

Spinning up a new Node.js project starts with a package.json, and while npm init walks you through the basics it doesn't actually help you fill in the dependencies, scripts, or engine constraints you'll want. A generator with sensible defaults saves you the back-and-forth between docs and editor.

Field reference

The full package.json schema runs to dozens of optional fields (peerDependencies, optionalDependencies, exports maps, the engines block, repository metadata) and most developers only remember the ones they use weekly. The generator surfaces them all in a single form so nothing gets forgotten when you're publishing to npm.

Standardization

Teams that want consistent license fields, repository URLs, and a shared set of npm scripts across every internal package usually end up with a manifest template. Generating that template from a structured form makes it easy to update when conventions evolve.

Educational/learning

Bootcamp students and self-taught developers often hit package.json early without much explanation of why each field exists. Working through a generator that shows the typical structure alongside common patterns is a faster way to absorb the schema than reading the npm docs cold.

Package.json Generator Examples

Minimal package.json

Input
Project name, version, description
Output
{\n  "name": "my-project",\n  "version": "1.0.0",\n  "description": "...",\n  "main": "index.js",\n  "scripts": {\n    "test": "echo 'no tests'\"\n  }\n}

This is roughly what npm init produces for a fresh Node project. Name, version, an entry point, and a placeholder test script are enough to get going, and you can fill in the rest as the project grows.

Library config

Input
NPM library to publish
Output
Includes: main (entry point), files (what to publish), peerDependencies (host requirements), keywords (npm search), repository, license, types (for TypeScript).

Anything you intend to publish on npm needs more attention than a private app. The files array controls which files actually get bundled into the tarball, peerDependencies declare what the host project must already provide, and the types field points TypeScript consumers at your declarations.

Modern web app

Input
Next.js or React app
Output
Includes: dev/build/start scripts, dependencies (react, next), devDependencies (typescript, eslint, prettier), engine versions.

Modern frameworks come with a stack of tooling dependencies. The generator produces the standard dev/build/start script trio, splits runtime dependencies (React, Next) from build-time ones (TypeScript, ESLint, Prettier), and pins a Node version range under engines so contributors don't accidentally use an unsupported runtime.

Tips & Best Practices for Package.json Generator

  • 1.Stick to semver. The major.minor.patch format isn't decoration, it's how npm and your users reason about whether an upgrade will break something. Bump major for breaking changes, minor for additions, patch for bug fixes.
  • 2.Set the engines.node field whenever it matters. Specifying something like '>=18' prevents the embarrassing class of bug where users install your package against Node 16 and hit a missing API.
  • 3.The license field is small but consequential. MIT is the default for permissive open source, ISC is functionally similar, Apache-2.0 adds patent protections, and 'UNLICENSED' marks proprietary code that shouldn't be redistributed.
  • 4.Scripts are where projects encode their muscle memory. dev, build, start, test, lint, and format cover most cases, and any custom script worth keeping should also be documented in the README so contributors can find it.
  • 5.Version range syntax matters more than people realize. '^1.0.0' allows any non-breaking minor or patch, '~1.0.0' restricts to patches only, and '1.0.0' pins exactly. Apps should generally pin, libraries should generally allow ranges.
  • 6.Modern projects often opt into ESM with type: 'module' or set up a monorepo with pnpm or yarn workspaces. The generator can scaffold either, but reach for them deliberately rather than out of habit.

Frequently Asked Questions

It's the JSON manifest at the root of every Node.js project. The file declares the project's metadata (name, version, description), the npm scripts you can run with 'npm run X', and the dependencies your code relies on at runtime and during development. It's been a fixture since npm launched in 2010, and you can't publish to the registry without one.

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