Instantly generate TypeScript-ready Zod schemas.

Paste any raw JSON payload to instantly generate clean, type-safe validation rules and inferred static types. Runs 100% locally in your browser with zero server roundtrips.

Start Converting Explore Examples
schema.ts
JSON Input
Zod Schema

Interactive Examples Hub

Load real-world API payloads instantly into the editor to see Zod schemas generated live.

Stripe Webhook

A Stripe payment_intent.succeeded event with nested object structures.

GitHub User API

A GitHub REST API user profile response with public profile data.

OpenWeather API

A complex nested weather API response with coordinates and systems.

Slack Block Kit

A Slack Block Kit message payload with nested blocks and accessories.

Frequently Asked Questions

Paste your raw JSON into the left input pane. The tool instantly evaluates the nested object shapes and outputs a complete Zod schema in real-time — no sign-up, no server. Your data never leaves your browser.

Zod is a TypeScript-first schema validation library. You define a schema once and Zod infers the static TypeScript type automatically via z.infer<typeof schema>. It is widely used with React Hook Form, tRPC, Next.js, and Hono for validating API responses, form inputs, and environment variables.

The converter outputs a complete Zod schema (e.g., z.object({ name: z.string(), age: z.number().int() })) exported as a named const, plus an exported TypeScript type derived via z.infer<typeof schema>. Paste it directly into any .ts file.

Use z.infer: type MyType = z.infer<typeof mySchema>. This gives you a TypeScript type that always stays perfectly synchronized with your Zod schema, eliminating the need to maintain duplicate interface definitions.

A JSON null value produces z.null(). Enable the Nullable toggle to add .nullable() to all non-null fields — e.g., z.string().nullable() — which is the correct Zod pattern for fields that may or may not contain data.

By default z.object() allows unknown keys to pass through silently. Enabling Strict Mode appends .strict() to every object schema, causing Zod to throw a ZodError if the validated data contains any keys not in the schema. Essential for secure API boundaries.

Yes — this is a very common pattern. Define a Zod schema for your .env variables and call schema.parse(process.env) at startup. Missing or invalid env vars throw an immediate, descriptive error rather than a confusing runtime failure later.

Free JSON to Zod Schema Generator — Online Converter

Stop hand-writing Zod schemas from API responses. This free, instant, browser-based JSON to Zod schema generator transforms any JSON payload into a complete, production-ready Zod schema definition in milliseconds. Whether you're working with REST API responses, tRPC routers, Prisma seeds, or webhook events, this tool eliminates the tedious manual process.

How the JSON to Zod Converter Works

The JSON to Zod schema generator runs 100% client-side using a recursive type-inference engine. Primitive values map directly to their Zod equivalents — z.string(), z.number(), z.boolean(), z.null(). Nested objects are recursively expanded into z.object() definitions. Arrays are inspected for element-type consistency: a uniform array becomes z.array(z.string()), while a mixed-type array becomes a z.union([...]).

The generated output is rendered with full VS Code–style syntax highlighting. The tool converts JSON to Zod schemas in real time with zero round trips to a server.

Key Features

  • Real-time generation. Updates on every keystroke — no buttons, no server, no wait time.
  • Strict Mode. Appends .strict() to all z.object() schemas to reject unknown keys at runtime.
  • Nullable & Optional toggles. Add .nullable() or .optional() to all fields in one click.
  • Integer detection. Whole numbers produce z.number().int(), decimals produce z.number().
  • Union types. Mixed-type arrays automatically produce z.union([...]) instead of the imprecise z.any().
  • One-click copy. Copy the full schema to your clipboard, ready to paste into any .ts file.

Your JSON Data Never Leaves Your Browser

Unlike server-based converters, this JSON to Zod converter performs all parsing and schema inference locally in your browser tab. Your JSON payloads — which may contain sensitive API keys, user records, or internal data structures — are never transmitted to any server. Generate Zod schemas from JSON safely, privately, and for free.