GraphQL Schema to Zod Schema Generator
Transform GraphQL SDL types, inputs, enums, and unions into robust runtime Zod validation schemas and TypeScript types with zero server uploads.
At a glance
GraphQL Schema to Zod Schema Generator is a free, client-side tool that converts GraphQL Schema Definition Language (SDL) into runtime Zod validation schemas. It accurately reflects GraphQL nullability semantics, enums, unions, and z.infer TypeScript types. Zero server uploads — everything compiles in browser memory.
100% Client-Side In-Browser Zod Schema Generator
GraphQL SDL schemas, types, enums, unions, and inputs compile to runtime Zod validators locally in your browser memory. Zero network traffic or cloud uploads.
How GraphQL Schema to Zod Codegen Works
Safely parsing incoming GraphQL query payloads, mutations, or API responses at runtime requires validation that aligns with your GraphQL schema. This zero-dependency code generator compiles GraphQL Schema Definition Language (SDL) types into battle-tested runtime Zod validation schemas with zero server overhead.
Spec-Compliant Nullability
In GraphQL SDL, fields are nullable by default. Our compiler faithfully translates unadorned fields (title: String) into z.string().nullable().optional() while strictly enforcing required fields marked with !.
Recursive Types via z.lazy
Graph data models frequently feature self-referential or circular dependencies. The generator automatically wraps nested object types in z.lazy(() => TypeSchema) to eliminate runtime reference errors.
Static & Runtime Parity
Each Zod validator is paired with an inferred static TypeScript type via z.infer<typeof Schema>, delivering seamless end-to-end type safety between your schema definitions and application code.
Why Use This GraphQL Schema to Zod Schema Generator?
How to Use GraphQL Schema to Zod Schema Generator
Paste GraphQL SDL or Upload Schema
Enter your GraphQL schema definitions or drop a .graphql / .gql file into the editor, or choose from one of the built-in domain presets.
Configure Zod Schema Options
Choose whether to include z.infer TypeScript types, export schemas, toggle strict nullability, or wrap circular types in z.lazy.
Copy or Download Zod Code
Review the generated Zod validation code in the output viewer, copy to clipboard, or download as a .ts file.
GraphQL User & Role Schema to Zod Validator
Compiles GraphQL User type and Role enum into runtime Zod validators with spec-accurate nullability.
enum Role { ADMIN MEMBER }
type User {
id: ID!
username: String!
email: String
role: Role!
tags: [String!]!
}
export const RoleSchema = z.enum(["ADMIN", "MEMBER"]);
export const UserSchema = z.object({
id: z.string(),
username: z.string(),
email: z.string().nullable().optional(),
role: RoleSchema,
tags: z.array(z.string())
});
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | TEXT/PLAIN, APPLICATION/GRAPHQL, .GRAPHQL, .GQL, .TXT → TEXT/TYPESCRIPT, TEXT/PLAIN, .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 schemas remain strictly on your local machine. Zero data is transmitted to external servers.
Frequently Asked Questions
Are my GraphQL schemas sent to an external server?
How does the generator handle GraphQL nullability in Zod?
Can I generate TypeScript static types alongside Zod schemas?
How are recursive or circular type references handled?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .