FreeDev Tools

JSON to Zod Schema

Generate a Zod validation schema from sample JSON — TypeScript-first runtime validation.

Runs locally in your browser. Your input is not uploaded.

How to Use

  1. 1

    Paste sample JSON

    Paste a representative payload — an API response or form data.

  2. 2

    Copy the schema

    The z.object schema and inferred TypeScript type are generated instantly.

  3. 3

    Refine constraints

    Add validators like .email() or .optional() to match your business rules.

Frequently Asked Questions

Zod is a TypeScript-first schema validation library. You define a schema once and get both runtime validation and inferred static types via z.infer.

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