package.json Generator

Generate a valid package.json to start a project — name, version, license, module type, and a set of sensible starter scripts. Free, instant, and private — generation happens in your browser.

100% Private — Runs entirely in browserInstant calculation & resultFree, no sign-up

package.json Generator

Generate a valid package.json to start a project — with sensible scripts and metadata.

package.json
{
  "name": "my-package",
  "version": "1.0.0",
  "description": "",
  "type": "module",
  "main": "index.js",
  "scripts": {
    "dev": "node --watch index.js",
    "start": "node index.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "license": "MIT"
}

Why generate package.json manifests with ToolJiffy?

The package.json manifest is the central configuration file for every Node.js, JavaScript, and TypeScript project. It defines project metadata, entrypoints (main, module, exports), module resolution rules (ESM vs CommonJS), and executable npm script commands. Hand-writing JSON manifests often causes syntax errors. ToolJiffy package.json Generator creates valid manifests instantly in your browser.

  • Spec-Compliant Node.js Manifest Generator: Formats valid package.json files with 2-space JSON indentation.
  • ES Module ("type": "module") & TypeScript Ready: Configures ESM module flags, main entrypoints, and types declarations.
  • Starter npm Scripts Integration: Pre-populates scripts for dev servers, build tools, test runners, and linters.
  • 100% On-Device Browser Security: Generates JSON manifests locally in browser memory without cloud server logging.

Native browser JSON generation & validation engine

ToolJiffy's generator uses JavaScript's native JSON.stringify() engine to output valid JSON formatting. It enforces npm package naming rules (lowercase, hyphenated) and validates entrypoint path syntax.

Whether starting a new Node.js backend microservice, setting up a React/Vite web application, or publishing a library to the npm registry, a clean package.json speeds up project setup.

Client-side security for private package manifests

Creating package configurations for commercial projects, internal company packages, or private repositories should never require uploading package metadata to remote servers.

ToolJiffy operates on a zero-cloud architecture. All manifest generation runs 100% locally in your browser tab. Your package data never leaves your device.

Step-by-step guide to generating package.json files

  1. Enter package metadata: Type package name (e.g. my-awesome-app), version (1.0.0), description, and author.
  2. Select module type & scripts: Choose ES Modules ("type": "module") or CommonJS and select starter npm script presets.
  3. Copy or download package.json: Click Copy JSON or Download package.json to save the file into your project root.

Frequently asked questions

How does the package.json Generator work in browser memory?

ToolJiffy builds valid Node.js `package.json` manifest files with project name, version, description, entrypoints (`main`, `module`, `exports`), module type (`module` vs `commonjs`), license, and npm script blocks.

What fields are generated in the package.json manifest?

Generated fields include `name`, `version`, `description`, `main`, `module`, `types`, `type` ("module" for ES Modules), `scripts`, `repository`, `keywords`, `author`, and `license`.

What is the difference between "type": "module" and CommonJS in package.json?

"type": "module" enables native ES Module imports (import/export) in Node.js. Omitting "type" defaults to CommonJS (require/module.exports).

Is my project configuration uploaded to any cloud server?

No, 100% private. All JSON generation and validation execute locally inside your browser memory. Your manifest configuration never leaves your computer.

How do I add starter npm scripts (dev, build, test, lint)?

ToolJiffy includes preset script blocks for Vite, Next.js, Express, Jest, Vitest, ESLint, and Prettier.

Does ToolJiffy validate JSON syntax automatically?

Yes! Generated `package.json` output is guaranteed to be 100% spec-compliant, valid JSON formatted with 2-space indentation.

How do I configure package exports for publishing to npm?

Configure `main` (CJS entry), `module` (ESM entry), and `types` (TypeScript declaration entry) for dual-package npm distribution.

Is ToolJiffy package.json Generator free without limits?

Yes! ToolJiffy is 100% free with unlimited usages, zero account sign-ups, and zero watermarks.

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