graphql-2-json-schema

Transforms GraphQL schema introspection data into a valid JSON Schema (draft-06). Current stable version is 0.10.0, maintained as needed. Key differentiators: supports GraphQL unions, input types, enums, descriptions, default values, nullable array items, and configurable ID scalar mapping. Lightweight with no production dependencies beyond GraphQL itself. Suitable for generating JSON Schema from GraphQL schemas for documentation or validation purposes.