Type Generator
JSON to Zod Schema Generator
Turn any JSON document into a typed Zod schema with one click — nested z.object() blocks, arrays, nulls, and a ready z.infer type. All client-side.
100% In-Browser & PrivateNo uploadsFree forever
Zod is the go-to validation library for TypeScript, and hand-writing schemas is tedious. MyJSONPal generates a complete Zod schema from any JSON document: objects become z.object() blocks, primitives become z.string()/z.number()/z.boolean(), arrays become z.array(), and nulls become z.null().
Nested objects are extracted into nested z.object() definitions automatically, so even deeply structured payloads generate correct, validatable schemas. The output finishes with an export type that uses z.infer, wiring your TypeScript types directly to the schema — no duplication.
Generation runs entirely in your browser. Paste an API response, generate the schema, and drop it straight into your project. Private, free, and instant.
How to generate a Zod schema
- 1Paste a JSON sample of the data shape you want to validate.
- 2Select Zod Schema from the format dropdown.
- 3Copy the generated z.object() schema with its z.infer type export.
- 4Paste it into a file where zod is already installed.
- 5Adjust refinements like .min(), .max(), or .optional() as needed.
Why MyJSONPal is different
Privacy-first, by design
All parsing, validation and conversion runs in your browser. Your data is never sent, logged, cached or sold — close the tab and it is gone.
Fast, even on huge files
Heavy processing is offloaded to a Web Worker, so multi-megabyte documents are handled without freezing the interface.
No accounts, no limits
There is nothing to sign up for and no usage quota. Paste, format, convert and download as often as you like.
Frequently asked questions
What types are generated?
Strings become z.string(), numbers z.number(), booleans z.boolean(), arrays z.array(), nulls z.null(), and objects z.object(). Empty objects become z.record(z.string(), z.unknown()).
How are nested objects handled?
Nested objects are extracted into their own z.object() definitions nested inside the parent, matching your JSON structure exactly.
Does it generate the export type?
Yes. Every schema ends with export type Name = z.infer<typeof name> so your TypeScript types stay in sync with your runtime validation.
Is the output ready to use?
The generated code imports { z } from "zod" and uses standard zod syntax, so it works with zod v3 and v4. Run it on the page, then paste it into your project.