JSON Schema to Zod

Runs locally in your browser
Input
Output
import { z } from "zod";

export const UserSchema = z.object({
  id: z.string(),
  email: z.string().email(),
  role: z.enum(["admin", "editor", "viewer"]),
  nickname: z.string().nullable().optional(),
  tags: z.array(z.string()).optional(),
});
export type User = z.infer<typeof UserSchema>;
json schema to zod

JSON Schema to Zod converter online

For the json-schema-to-zod search intent, this is the FrameworkKit online converter: paste a JSON Schema document and generate Zod validators plus inferred TypeScript types in the browser. It resolves shared subschemas under $defs or definitions and follows JSON Schema keywords for supported features.

Supported JSON Schema keywords

The converter covers the keywords developers reach for first across Draft 7, 2019-12, and 2020-12.

  • type, properties, required, additionalProperties, and nested objects.
  • string, number, integer, boolean, and array with items.
  • enum, const, oneOf, anyOf, allOf, and nullable type arrays.
  • $ref to local $defs and definitions.

Diagnostics for unsupported keywords

Keywords without a reliable Zod equivalent, such as patternProperties, if/then/else, and dependentSchemas, are skipped and surfaced as diagnostics so the output stays honest and reviewable.

Privacy and safety

FrameworkKit does not execute pasted documents. It parses JSON, rejects prototype-like keys, and runs conversion in the browser so private schema contracts can be reviewed without a server upload.

FrameworkKit vs the npm json-schema-to-zod package

Use FrameworkKit for interactive online conversion, shareable examples, and visible diagnostics. Use the npm json-schema-to-zod package or a build script when conversion should run inside your project, CI, or tests so the Zod schemas stay synchronized with the source contract.

What this tool does

Use an online converter to turn a JSON Schema document into Zod validators and inferred TypeScript types without uploading code.

Convert JSON Schema to Zod

Turn a JSON Schema contract owned by an API, gateway, or registry into runtime Zod validators for TypeScript.

Reuse shared subschemas

Resolve $defs and definitions referenced with $ref into separate exported Zod schemas.

Review coverage before shipping

Inspect required fields, enums, nullable values, arrays, and unions, and read diagnostics for unsupported keywords.

JSON to Zod resources

Use the examples, guides, and comparison pages together when turning sample JSON into production validation code.

JSON Schema to Zod examples

Review object, enum, nullable, $defs, and $ref conversion examples before using the converter.

JSON Schema to Zod guide

Map JSON Schema keywords to Zod, resolve $ref and $defs, and review unsupported keyword diagnostics.

Zod to JSON Schema vs JSON Schema to Zod

Choose the right direction when moving between Zod schemas and portable JSON Schema contracts.

OpenAPI to Zod converter

Use the OpenAPI-aware converter when the source is an OpenAPI or Swagger document instead of raw JSON Schema.

Zod to JSON Schema Converter

Use the opposite direction when TypeScript-owned Zod schemas need portable JSON Schema output.

Privacy model

JSON Schema to Zod runs in your browser. FrameworkKit does not send tool input or generated output to a server in the current app.

FAQ

Is this the npm json-schema-to-zod package?

No. FrameworkKit is a browser-only online converter for reviewing and copying Zod output from a JSON Schema document. Use the npm json-schema-to-zod package or a build script when conversion should run inside your project, CI, or tests.

Which JSON Schema drafts are supported?

The converter handles common keywords across Draft 7, 2019-12, and 2020-12, including type, properties, required, enum, const, arrays, oneOf/anyOf/allOf, nullable type arrays, $ref, and shared subschemas under $defs or definitions.

What happens with keywords it cannot convert?

Keywords such as patternProperties, if/then/else, and dependentSchemas are skipped and reported as diagnostics so you can review the affected fields instead of trusting incomplete output.

Is my schema sent to a server?

No. Conversion runs entirely in your browser and the pasted JSON Schema is never uploaded.