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How to Generate TypeScript from GraphQL - Step by Step Guide

Step 1

Input Your GraphQL Schema or Query

Start by pasting your GraphQL schema, query, or mutation. Whether you're working with Apollo Client, need to validate schemas, or want to format GraphQL first, you have several options:

•
Paste directly: Copy your GraphQL code from your urql or Apollo project
•
Upload a file: Click "Upload" to select a .graphql or .gql file
•
Try the sample: Click "Sample" to see TypeScript generation in action

Example: GraphQL Schema Input

Sample GraphQL type definition:

type User {
  id: ID!
  name: String!
  email: String!
  posts: [Post!]!
}
Step 2

Automatic TypeScript Generation

The tool automatically converts your GraphQL to TypeScript with:

•
Type safety: Generates fully-typed TypeScript interfaces with strict nullability
•
Clean code: Produces readable, properly formatted TypeScript code
•
Smart mapping: Converts GraphQL types to appropriate TypeScript equivalents

Example: Generated TypeScript Output

TypeScript interface generated from the schema:

export interface User {
  id: string;
  name: string;
  email: string;
  posts: Post[];
}
Step 3

Use in Your TypeScript Project

Copy the generated TypeScript code and use it in your project:

•
Copy to clipboard: One-click copy for quick pasting into your code
•
Download as .ts file: Save directly to your project's types folder
•
Type-safe queries: Use with Apollo Client, urql, or any GraphQL client

Frequently Asked Questions

How do I convert GraphQL to TypeScript?

Simply paste your GraphQL schema, query, or mutation into the tool. It automatically generates type-safe TypeScript interfaces and types that match your GraphQL definitions. Perfect for Apollo Client, urql, or any GraphQL project.

Does this work with Apollo Client and urql?

Yes! The generated TypeScript types work seamlessly with all GraphQL clients including Apollo Client, urql, graphql-request, and Relay. You can use them directly in your queries, mutations, and subscriptions for full type safety.

How are GraphQL types mapped to TypeScript?

GraphQL ID and String become TypeScript string, Int and Float become number, Boolean becomes boolean. Non-null fields (!) become required properties, nullable fields become optional with undefined. Arrays are properly typed, and custom scalar types are handled appropriately.

Can I convert GraphQL fragments to TypeScript?

Yes! The tool handles GraphQL fragments and generates corresponding TypeScript types. This is especially useful for reusable query fragments in Apollo Client or when working with complex nested data structures.

Is this better than GraphQL Code Generator?

This tool is perfect for quick conversions and prototyping. For production projects with many schemas, GraphQL Code Generator CLI is recommended as it integrates into your build process. This online tool is ideal for one-off conversions, learning, and quick type generation.

Is the GraphQL to TypeScript converter free?

Yes, completely free with no limitations. Generate unlimited TypeScript types from your GraphQL schemas and queries. No registration required, and your GraphQL code never leaves your browser.

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