GraphQL Schema to TypeScript MongoDB Converter

Free GraphQL Schema to TypeScript MongoDB Converter

Paste a GraphQL SDL schema to generate TypeScript interfaces in the spirit of graphql-codegen-typescript-mongodb, with an approximate _id field added to every generated type.

How to Use It

Paste your GraphQL schema definition language (SDL) into the input box, or click "Load Example" to see a sample run. The tool generates the same TypeScript interfaces as the plain GraphQL to TypeScript converter, then adds an optional _id?: string; field to every generated interface to approximate what Apollo's graphql-codegen-typescript-mongodb plugin would add for types backed by a MongoDB collection.

Example

A User type generates its usual fields (id, name,email, posts) plus an added _id?: string; line and a comment noting that this is an approximation, not an exact reproduction of the real plugin's behavior.

Common Use Cases

FAQs

Is this an exact match for the real graphql-codegen-typescript-mongodb plugin?

No — this is explicitly a best-effort approximation. The real plugin only adds an _idfield to types you've explicitly mapped to a MongoDB collection (typically typed as ObjectID rather than string), and supports additional configuration this tool doesn't attempt to replicate. This tool adds _id?: string; to every generated interface as a rough, best-effort stand-in — treat it as a starting point, not a drop-in replacement for running the real codegen plugin.

How are custom scalars and nullability handled?

The same as the plain GraphQL to TypeScript converter — custom scalars map to any with a comment, and nullable fields become field?: T | null.

Is my schema uploaded anywhere?

No — parsing and type generation happen entirely client-side in your browser. Nothing you paste is sent to a server.