JSON to Zod Schema

What is Zod?

Zod is a TypeScript-first schema validation library with static type inference. It allows you to build schemas that validate data at runtime while providing full TypeScript types. With over 30 million weekly npm downloads, Zod is the most popular runtime validation library in the TypeScript ecosystem.

Why Use Zod?

• Type Safety: Automatic TypeScript type inference from schemas
• Runtime Validation: Validate data at runtime, not just compile time
• Zero Dependencies: Lightweight and self-contained
• Composable: Build complex schemas from simple ones
• Ecosystem: Integrates with React Hook Form, tRPC, Prisma, and more

Using Generated Zod Schemas

import { z } from 'zod';

// Generated schema
const UserSchema = z.object({
  id: z.number(),
  name: z.string(),
  email: z.string().email(),
});

// Infer the type
type User = z.infer<typeof UserSchema>;

// Parse and validate data
const user = UserSchema.parse(data);

// Safe parsing (returns result object)
const result = UserSchema.safeParse(data);
if (result.success) {
  console.log(result.data);
} else {
  console.log(result.error);
}

Common Use Cases

• API Validation: Validate request bodies and query parameters
• Form Validation: Integrate with React Hook Form for type-safe forms
• Environment Variables: Validate process.env with Zod schemas
• tRPC: Define input/output schemas for type-safe APIs
• Config Files: Validate JSON/YAML configuration files
• Database Models: Validate data before database operations

FAQ