JSON to Zod
Convert any JSON object into a TypeScript Zod schema instantly. Supports nested objects, arrays, enums, and optional fields.
JSON to Zod — generate TypeScript validation schemas
A JSON to Zod schema generator saves developers hours of manual schema writing. FormatList's free online tool takes any JSON object and instantly produces a complete TypeScript Zod schema with inferred types.
Why use JSON to Zod?
- Save time — generate Zod schemas from API responses, config files, or sample data in one click.
- Type safety — Zod provides runtime validation with full TypeScript type inference.
- Nested support — handles deeply nested objects, arrays, enums, and optional fields automatically.
- AI workflow — generate schemas from AI model output for validation in production.
JSON to Zod FAQ
What is Zod?
Zod is a TypeScript-first schema declaration and validation library. It lets you define schemas that validate data at runtime while automatically inferring TypeScript types for compile-time safety.
How does JSON to Zod work?
It parses your JSON object and recursively infers Zod types from each value: strings become z.string(), numbers become z.number(), booleans become z.boolean(), objects become z.object(), and arrays become z.array() with inferred item types.
Does it support nested objects?
Yes. Deeply nested JSON objects are fully supported. Each nested level gets its own z.object() schema with all fields properly typed.
Does it detect enums?
Yes. If an array contains all unique string values, the tool generates z.enum() instead of z.array(z.string()). This is useful for validating fixed sets of values like roles or statuses.
Does it handle optional fields?
Yes. Fields with null values are automatically marked as .optional() in the generated Zod schema, giving you accurate validation for nullable properties.
Is my data sent to a server?
No. All schema generation happens locally in your browser. Your data never leaves your computer.
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