GraphQL Schema to TypeScript Generator
Transform GraphQL SDL types, inputs, enums, and unions into clean, strongly-typed TypeScript interfaces and type definitions directly in your browser.
At a glance
GraphQL Schema to TypeScript Generator is a free, client-side tool that converts GraphQL Schema Definition Language (SDL) into strongly-typed TypeScript interfaces and types. It accurately handles GraphQL nullability rules, enums, inputs, and unions. Zero server uploads — everything compiles in browser memory.
100% Client-Side In-Browser TypeScript Generator
GraphQL SDL schemas, interfaces, enums, and unions compile locally in your browser sandbox. Zero code or schema definitions ever touch a remote server.
How GraphQL Schema to TypeScript Codegen Works
Writing manual TypeScript interfaces that mirror backend GraphQL schemas is tedious and prone to drift. This zero-dependency code generator translates GraphQL Schema Definition Language (SDL) files into clean, strongly-typed TypeScript declarations with strict nullability preservation.
Spec-Compliant Nullability
In GraphQL, fields are nullable by default and only required when marked with !. Our compiler translates title: String into title?: string | null and id: ID! into mandatory id: string.
Full AST Coverage
Seamlessly compiles object types, input filters, GraphQL interfaces with extends inheritance, string unions, enums, and custom scalar type declarations.
Secure & Private
Your proprietary GraphQL schema files and internal API contracts never leave your browser sandbox. All compilation and formatting execute 100% client-side with zero external network traffic.
Why Use This GraphQL Schema to TypeScript Generator?
How to Use GraphQL Schema to TypeScript Generator
Paste GraphQL SDL or Upload Schema
Enter your GraphQL schema definitions into the left editor, upload a .graphql file, or load one of our built-in domain presets (User & Auth Schema, E-Commerce Checkout, CMS & Publishing).
Configure TypeScript Options
Select your preferred declaration style (interface or type alias), toggle readonly modifiers, customize strict nullability, and select enum format.
Copy or Download TypeScript
Review the generated TypeScript declarations in the live output panel, copy to clipboard with one click, or download as a .d.ts definition file.
Social User GraphQL SDL to TypeScript Interface
Compiles the GraphQL User type and Role enum into TypeScript declarations with precise nullability rules.
enum Role { ADMIN MEMBER }
type User {
id: ID!
username: String!
email: String
role: Role!
tags: [String!]!
}
export enum Role {
ADMIN = ADMIN,
MEMBER = MEMBER
}
export interface User {
id: string;
username: string;
email?: string | null;
role: Role;
tags: Array<string>;
}
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | TEXT/PLAIN, APPLICATION/GRAPHQL, .GRAPHQL, .GQL, .TXT → TEXT/TYPESCRIPT, TEXT/PLAIN, .TS, .D.TS |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs. |
| Performance Constraints | Runs 100% client-side in browser memory. Performance bounded by local device RAM. |
100% Client-Side Privacy Guarantee
Your files remain strictly on your local device. Zero data is transmitted to external servers.
Frequently Asked Questions
Are my GraphQL schemas transmitted to an external server?
How does the tool handle GraphQL nullability?
Can I generate type aliases instead of interfaces?
Does it support GraphQL inputs, enums, and unions?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .