GraphQL to TypeScript Types
GraphQL to TypeScript Types: Maps GraphQL scalar types (ID -> string, String -> string, Boolean -> boolean) to TypeScript interfaces.
About this graphql to typescript types
GraphQL to TypeScript Types — browser-based utility.
How this tool works
Implements client-side GraphQL to TypeScript Types operations. Maps GraphQL scalar types (ID -> string, String -> string, Boolean -> boolean) to TypeScript interfaces specifically designed for a full-stack engineer generates typescript type definitions from graphql schema definition language (sdl).
- Document Lexical Analysis: Tokenizes GraphQL operations, directives, arguments, variables, and comments.
- AST Construction & Fragment Validation: Resolves fragment spreads, verifies balanced braces, and validates variable type declarations.
- Pretty-Printing & Formatting: Applies 2-space indentation and normalizes comma-separated vs whitespace-separated argument lists.
- Schema Type Emission: Emits corresponding TypeScript interfaces or Protobuf message definitions.
Worked example
Scenario: A full-stack engineer generates TypeScript type definitions from GraphQL Schema Definition Language (SDL).
Sample input:
Processing: Maps GraphQL scalar types (ID -> string, String -> string, Boolean -> boolean) to TypeScript interfaces.
Illustrative output:
Limits and verification
Enforces strict GraphQL grammar: rejects unclosed brackets, missing variable types, or illegal punctuation. Protobuf parsing supports proto3 syntax; proto2 extensions are flagged with compatibility warnings.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Enter, paste, or select your input data into the GraphQL to TypeScript Types workspace controls.
- Review available parameter fields, units, formats, or options configured for your task.
- Click the action button or observe immediate live calculations rendered in your browser runtime.
- Inspect the resulting output and any diagnostic messages, then copy or download the result if needed.
Frequently asked questions
How does GraphQL to TypeScript map fields?+
It finds type Name declarations with a regular expression and emits export interface Name. ID and String map to string, Int and Float to number, Boolean to boolean, and an unknown named type remains that name.
What did the TypeScript fixture verify?+
type User with id ID!, email String and roles [String!]! produced id: string, optional email?: string, and roles: Array<string>. This demonstrates non-null, optional scalar, and non-null list mapping.
How are nullability and lists represented?+
A trailing ! makes the property required. Without it the property is optional. A bracketed type becomes Array of its item, and a nullable list item receives | null; nested wrappers are not fully parsed.
What does this generator omit?+
It does not generate enums, unions, input types, descriptions, directives, operations, runtime validation, imports, discriminated unions, or a TypeScript compiler check of the output.