AnyTool
Your files never leave your device. All processing happens locally in your browser.

How do I create a package.json file?

Fill in a guided form — name, version, description, scripts, dependencies, license, and exports — and AnyTool builds a valid package.json with live preview, npm-name validation, and a full SPDX license picker. Framework presets seed sensible scripts and defaults. Everything runs in your browser; copy or download instantly.

  • All core fields plus scripts, deps, exports, bin, and engines
  • Full SPDX license picker with expression validation
  • Live npm package-name and semver validation
  • Framework presets (Next.js, React+Vite, Express, Node CLI, Library)
  • 100% client-side — no registry calls by default, works offline

What is

package.json

package.json is the manifest file at the root of a Node.js or npm project. It declares the package name, version, scripts, dependencies, license, and entry points, and is read by npm, pnpm, and yarn to install and run the project.

Developer Tools

Related terms

npmNode.jsDependenciesSPDX LicenseScripts

How to Generate a package.json

Build a valid package.json with a guided form in your browser.

45 secWeb browser
  1. 1

    Choose a preset

    Optionally start from a framework preset, or fill the form from scratch.

  2. 2

    Fill fields

    Set name, version, scripts, dependencies, license, and exports — with live validation.

  3. 3

    Export

    Copy or download the generated package.json — nothing is uploaded.

Result: A package.json file

Frequently Asked Questions

Yes — it checks names live against the official npm naming rules.

The generator validates your package name in real time using the canonical npm rules (length, scope, URL-safe characters, leading-dot rules), and validates SPDX license expressions and semver ranges too — catching mistakes most generators miss.

No registry calls by default — you control versions, keeping it fully offline.

By default it does not call the npm registry, so it works offline and keeps the privacy promise. You enter dependency ranges yourself; any "fetch latest version" action is opt-in and clearly labeled as leaving the browser.

Yes — pick a framework preset to seed the right scripts and defaults.

Presets for Next.js, React+Vite, Express, Node CLI, and npm Library seed sensible scripts, type (ESM/CommonJS), and defaults, which you can then customize field by field.

Detailed Explanation

Methodology

How the Package.json Generator Works

AnyTool builds a package.json from a guided form covering all core fields (name, version, description, type, main/module/types, files, private), a scripts editor, dependency/devDependency/peerDependency management, a full SPDX license picker, and an exports/bin/engines editor. It validates the package name live against the official npm rules, checks SPDX license expressions and semver ranges, and rebuilds a syntax-highlighted preview on every keystroke. Framework presets seed sensible scripts and defaults.

  • All core fields plus scripts, deps, exports, bin, engines
  • Live npm package-name validation (official rules)
  • Full SPDX license picker with expression validation
  • Framework presets (Next.js, React+Vite, Express, CLI, Library)
  • Live syntax-highlighted preview; copy or download
Privacy & Security

Privacy and Offline Use

The SPDX license list and name-validation rules are bundled, so the generator makes no npm registry calls by default and works fully offline — beating ad-walled hubs (ToolsZone, IO Tools) and any server-side generator. Any "fetch latest version" action is opt-in and clearly labeled as leaving the browser.

Package.json Generator: AnyTool vs typical tools
CapabilityAnyToolTypical tools
GenerationIn your browserOften ad-walled hubs
Full SPDX license pickerYesOften 6 presets
Live npm-name validationYesRare
exports / bin / engines editorYesUsually missing
Works offlineYesNo

Capabilities reflect the live AnyTool tool; competitor behavior varies by service.