JSON to Zod Schema

Generate a Zod RootSchema from every JSON value and array element. Objects reject unknown keys; mixed arrays use unions. Validation preserves original own properties, including __proto__, and deep inputs use separate schema declarations.

Input

Output

Loading tool module...

About this json to zod schema

JSON to Zod Schema — browser-based utility.

How this tool works

Paste one complete JSON value or load the sample.
Run locally to generate code, then copy the complete result.
Compile or validate the code in your target project and review inferred types before use.

Worked example

Scenario: Zod: Generate a model for the displayed object and retain every original property.

Sample input:

{"id":1,"name":"Ada"}

Processing: Infer each value, emit the target declarations, then validate the original object using the target compiler or library.

Illustrative output:

import { z } from "zod"; const InferredSchema = z.object({ ["id"]: z.number(), ["name"]: z.string() }).strict(); // Validate without replacing the input object, preserving own keys such as __proto__. export const RootSchema = z.unknown().superRefine((value, context) => { const result = InferredSchema.safeParse(value); if (!result.success) { for (const issue of result.error.issues) context.addIssue({ code: "custom", path: issue.path, message: issue.message }); } }).transform(value => value as z.infer<typeof InferredSchema>);

Limits and verification

Accepts JSON text up to 1,000,000 UTF-16 code units and 100 nesting levels; output is limited to 8,388,608 code units. Invalid syntax, duplicate keys, invalid Unicode, unsafe integer values, overflow, underflow and decimal precision loss are rejected. Quote exact large numbers as strings. Dates remain strings. Inference describes the supplied sample, not every possible API response. Install Zod 3 or 4 and use RootSchema.parse or safeParse. Empty arrays infer unknown elements; numbers use z.number without inferred bounds or integer rules. No optional fields, enums or date validators are inferred.

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

Paste one complete JSON value or load the sample.
Run locally to generate code, then copy the complete result.
Compile or validate the code in your target project and review inferred types before use.

Frequently asked questions

What exact Zod strict object schema does this page emit from the sample?+

The generated module imports z, builds InferredSchema, and superRefine forwards validation issues without replacing the input object.

How are JSON names and value types represented in this Zod strict object schema?+

z.object fields plus .strict() and RootSchema. The generated module imports z, builds InferredSchema, and superRefine forwards validation issues without replacing the input object.

What inference boundary applies to Zod strict object schema output?+

It derives from one sample rather than discovering every production variant; invalid JSON and restricted numeric/Unicode forms are rejected first.

Does Zod strict object schema generation execute or upload the generated language?+

Generation runs locally in the browser as text transformation; it does not execute, compile, or upload the generated Zod strict object schema. Ordinary page resource requests remain separate.