Package.json Validator

Inspect, validate, and debug your Node.js manifest configuration files for syntax errors, missing mandatory properties, and semver versioning format issues.

Input package.json Content:

Enforce recommended npm property rules & naming standards

Comprehensive Validation Report: Ready

Validation Standard Guidelines

1. Mandatory Properties

A valid package manifest requires both a name and a version string field to be recognized by npm registries.

2. Naming Restrictions

Package names cannot contain capital letters, spaces, or special characters, and must be URL-safe under npm repository guidelines.

What is Package.json Validator?

Inspect, validate, and debug your Node.js manifest configuration files for syntax errors, missing mandatory properties, and semver versioning format issues.

Package.json Validator features

Input and option fields: Enforce recommended npm property rules & naming standards, Comprehensive Validation Report:.

Practical guidance for Package.json Validator

Check the package manager and versioning convention used by the project. Similar range strings can be interpreted differently by different ecosystems.

Version ranges depend on package-manager semantics and project lockfiles. Compare the result with the package manager and registry used by the project.

Frequently Asked Questions (FAQ)

JSON requires strict adherence to double-quote syntax and trailing comma rules. A single stray comma or missing quote will prevent npm from parsing dependencies correctly.

Package names must be lowercase, shorter than 214 characters, and cannot start with a dot or underscore. They may contain hyphens or periods.

Version numbers and range specifiers (like ^1.0.0 or ~2.1.0) must follow proper version formatting so package managers can correctly resolve updates.