INPUT - JSON
OUTPUT - Zod
Output will appear here
100% client-side
Output will appear here
Generate Zod validation schemas from JSON data with our free JSON to Zod converter. The tool auto-detects email, URL, UUID, and date formats and applies matching validators, producing a single source of truth for both TypeScript types and runtime validation. Perfect for API input validation and form handling in modern TypeScript projects.
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Enter any valid JSON in the input editor. The converter works with objects, arrays, and primitive values of any depth.
The output pane shows a complete Zod schema with z.object(), z.array(), z.string(), z.number(), and format-specific validators like z.string().email().
Copy the schema or download it as a .ts file. Import it in your project to get both compile-time types and runtime validation from a single source of truth.
The converter inspects string values for patterns matching emails, URLs, UUIDs, and ISO 8601 dates. When a match is found it applies the corresponding Zod validator such as z.string().email(), giving you stricter runtime validation out of the box.
Yes. The generated schema is a standard Zod object, so you can wrap it with z.infer<typeof schema> to derive a static TypeScript type. This gives you both compile-time types and runtime validation from one definition.
Both, and they are inferred separately. A field seen with a null value gets .nullable(). A key that is missing from some objects in an array gets .optional(). Every generated schema is tested by parsing back the exact JSON it was inferred from, so a schema that would reject its own source input is a build failure.
The output uses the z.object / z.array / z.string / z.union API surface, plus .nullable(), .optional() and the string format refinements. That surface was verified to parse correctly on both Zod 3.25 and Zod 4.4. On Zod 4 the string format methods still work but are deprecated in favour of the top-level z.email() style helpers.