Schema helper

JSON to Zod schema

Paste JSON and instantly generate a Zod schema with inferred shapes.
Objects and arrays are inspected to choose the right validators and unions,
so you can reuse the schema for parsing or runtime validation.

Everything runs locally in your browser—no data is sent anywhere.

Enter JSON

Generated Zod schema

Guide

How to use & features

Paste JSON into the input and click “Convert to Zod.”
Objects are formatted into `z.object({...})` blocks with nested schemas.
Arrays infer their element types; mixed values are wrapped with `z.union([...])`.
Use the copy or clear buttons to reuse the schema or start over.

Samples

Sample input & output

Convert JSON to Zod schema

Input

{"id":42,"enabled":false,"labels":["alpha","beta"]}

Output

const Schema = z.object({
    id: z.number(),
    enabled: z.boolean(),
    labels: z.array(z.string()),
});

FAQ

Frequently asked questions

What does the output look like?

The tool builds a root z.object(...) schema and nests additional objects or arrays using Zod validators.

How are nulls or mixed types handled?

Null values become z.null(), and arrays with mixed element types are wrapped in z.union([...]).

Is any data sent to a server?

No. Everything runs locally in your browser; nothing is transmitted over the network.

Use cases

Common use cases

Drafting form validation
Generate Zod schemas from backend examples and drop them into front-end validation logic immediately.
Verifying mock data
Parse local mock JSON with Zod to catch unexpected fields or shapes at runtime.
Sharing schema fragments
Copy generated snippets to reuse across libraries and keep runtime checks aligned with types.

Notes

Notes & limitations

Work stays in your browser
Inputs and outputs remain local. Closing the tab or clearing cache will remove any temporary state.
Validate critical data
Results are helper outputs—double-check them before sending to production systems or sharing externally.
Large payloads depend on your device
Very large text or files can feel slow in some browsers. Use a desktop environment for heavy workloads.