Inference rulesNested objects become separate schemas; arrays are typed; missing fields get .optional(), nullable values get .nullable(); mixed types become z.union; identical shapes are deduped.Runs locally — no fixed size limit (bounded by browser memory)

Sample JSONJSON

Paste or type JSON

Generated schemaZod

Paste or type JSON

JSON → Zod schema · runs locally · no upload

JSON to Zod Schema Generator

Sample JSON → z.object · nested schemas · optional & nullable · z.infer types

🔒Your data is processed locally in the browser — never uploaded, never stored

No upload, no storage

JSON is processed in memory and never sent to a server.

Share via URL fragment

Share links encode data in the # anchor — never sent to a server.

Remember last edit

Optionally keep your last input locally; clear it with one click.

Why generate Zod schemas from JSON

Generate z.object schemas

Nested objects split into their own schema constants, declared before use — paste them in and go.

Validation and types in one

Every schema ships a z.infer type export, so runtime validation and TypeScript types stay in sync.

Optional, nullable, unions

Missing fields get .optional(), nullable values get .nullable(), mixed types become z.union.

Built for Zod 4

Emits current Zod syntax rather than long-abandoned templates.

Runs locally — no upload

Generation happens entirely in your browser. Nothing is uploaded or stored.