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"JSON to Zod":{ }

Paste a JSON sample and get clean Zod schemas. Nested objects become named types, arrays become typed collections, and nullable fields are handled. Powered by quicktype's inference engine running 100% in your browser: zero network requests, so real API payloads stay on your machine.

What is a JSON to Zod converter?

Hand-writing schemas for an API response is slow and error-prone. This tool infers Zod schemas from a JSON sample: nested objects become named types, arrays become typed collections, and null/missing values become optional fields. It runs quicktype's inference engine entirely in your browser, so real API payloads (often containing user data or credentials) never leave your machine.

Zod mapping notes

  • Each object becomes a z.object({...}) schema, plus an inferred type via z.infer<typeof Schema>.
  • Nested objects are lifted into their own named schemas and referenced from the parent.
  • Missing/null fields become .optional(); arrays become z.array(...). Parse at runtime with RootSchema.parse(data).

How to use

  1. Paste a JSON sample (an API response works well) into the Input pane.
  2. Generated Zod schemas appear instantly. Nested objects become their own named types.
  3. Non-standard JSON (single quotes, trailing commas, comments) is auto-repaired first.
  4. Copy the code into your project.

Examples

JSON → Zod schemas

Input
{
  "id": 42,
  "name": "workbench",
  "owner": { "email": "[email protected]", "active": true }
}
Output
import * as z from "zod";

export const OwnerSchema = z.object({
    "email":  z.string(),
    "active": z.boolean(),
});
export type Owner = z.infer<typeof OwnerSchema>;

export const RootSchema = z.object({
    "id":    z.number(),
    "name":  z.string(),
    "owner": OwnerSchema,
});
export type Root = z.infer<typeof RootSchema>;

FAQ

How do I convert JSON to Zod types?

Paste any JSON sample. The schemas are inferred from the values and nesting, entirely in your browser. Nothing is uploaded.

How are nested objects handled?

Each distinct nested object becomes its own named type, referenced from the parent, arrays of objects included.

What about optional or null fields?

Fields that are null or missing in parts of the sample are typed as optional/nullable in the generated code.

Can I paste multiple samples?

Paste an array of objects: the type is inferred from the union of all items, which catches optional fields a single sample would miss.

Which Zod version does the output need?

It uses the standard z.object / z.string / z.array / z.infer API, which is stable across Zod 3. Add zod to your project and import the generated schemas.

Is my JSON uploaded?

No. Generation runs 100% in your browser via quicktype's engine. Check DevTools: zero network requests.

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