What does this tool do?
The package.json Generator lets you build a valid Node.js package.json through a simple form. Fill in name, version, description, main, and license, add your scripts, dependencies, and devDependencies, and copy the neatly formatted JSON instantly. It is ideal for developers spinning up a new project who want a clean manifest without hand-typing brackets.
How to use it
- Enter your configuration details.
- Review the generated output.
- Copy the ready-to-use code or file.
Scripts, dependencies, and devDependencies
The form has three distinct sections. Under "Scripts" you define npm commands like start, dev, build, and test; each row becomes an entry in the JSON "scripts" object. "Dependencies" lists packages your app needs at runtime, while "DevDependencies" holds tools needed only during development, such as TypeScript, test frameworks, and linters. For each package you set a version range using semver syntax like ^4.18.0. Empty rows are skipped automatically, so the output stays clean.
Understanding semver version syntax
Version fields accept a caret (^), a tilde (~), or a fixed number. ^4.18.0 allows new minor and patch updates while keeping the major version fixed; ~4.18.0 allows only patch updates; 4.18.0 pins to that exact release. Choosing the right range keeps installs predictable across machines. After copying the generated file, save it as package.json in your project root and run npm install or yarn to fetch the listed packages.
Frequently asked questions
Is the output a valid package.json?
Yes. The tool formats your fields as clean, two-space-indented JSON that follows the standard npm schema, so you can save it directly in your project root.
What is the difference between ^ and ~ in version ranges?
A caret (^) allows new minor and patch releases, a tilde (~) allows only patch releases, and omitting both pins the package to that exact version.
Are empty dependency rows included in the output?
No. Only packages and scripts with a non-empty name are written to the JSON; blank rows are ignored automatically.
Is package.json Generator free?
Yes. package.json Generator and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. package.json Generator works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.