Generator Knowledge Base

JSON to Zod: Generate z.object() Schemas for Runtime Validation

Generate Zod runtime validation schemas from any JSON. Smart type inference for email, URL, UUID, datetime. Exports z.infer<> TypeScript types. Free, browser-only.

Why Use Zod for Runtime Validation?

TypeScript interfaces are erased at compile time — they cannot catch malformed API responses at runtime. Zod schemas validate data during execution, preventing type assertion failures, null reference errors, and corrupted state.

Smart Type Inference

Unlike basic generators, JSON2X detects semantic string formats and generates specific Zod validators:

  • Email addresses → z.string().email()
  • URLs → z.string().url()
  • UUIDs → z.string().uuid()
  • ISO datetime strings → z.string().datetime()
  • All other strings → z.string()

Zero-Duplication Type Safety

Enable "Export inferred type" to get export type MyType = z.infer<typeof mySchema>. This derives a TypeScript type from the Zod schema automatically — no interface declaration needed.

Try Our Free Client-Side Developer Tools

Zero latency, 100% data privacy, and Web Worker performance.

Launch Tool

Frequently Asked Questions

How does the generator detect email, URL, and UUID formats?

The generator tests each string value against regex patterns for email, URL (http/https), UUID v4 format, and ISO 8601 datetime.

What is .strict() mode in Zod?

With .strict() enabled, Zod throws a validation error if the input object contains any keys not defined in the schema. Useful for strict API contract enforcement.

Does the generated schema work with Next.js API routes?

Yes. Use schema.parse(req.body) in any Next.js API route to validate and type-safe the incoming request body.

Can I use the output with tRPC?

Yes. The generated z.object() schema works directly as a tRPC input validator in your router procedure definitions.

Related JSON Topics & Reference Articles