JSON to Zod Schema Converter - Runtime Type Validation
Free Zod Schema Generator for TypeScript Runtime Validation
Convert JSON to Zod schemas with runtime validation, type inference, and schema validation for TypeScript applications.
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JSON to Zod: Generate Runtime Validation Schemas from JSON
Create Zod validation schemas from JSON data for runtime type checking and data validation in TypeScript applications.
Input Your JSON Data
Start by adding your JSON data from API responses, form inputs, or configuration files that needs runtime validation with Zod schemas. The tool analyzes the structure and generates type-safe validation schemas compatible with TypeScript:
Automatic Schema Generation
The tool automatically generates Zod schemas with intelligent type inference and validation rules:
Use in Your TypeScript Project
Get your complete Zod schemas ready for runtime validation in your applications:
Example: Converting User Data JSON to Zod Schema
Consider you have a user registration form with this JSON structure:
{ "username": "john_smith", "email": "[email protected]", "age": 25, "isActive": true, "website": "https://johnsmith.dev" }
The tool generates this Zod schema with runtime validation:
import { z } from 'zod'; export const schema = z.object({ username: z.string(), email: z.string().email(), age: z.number().int(), isActive: z.boolean(), website: z.string().url(), }); export type Schema = z.infer<typeof schema>; // Usage: Validate runtime data const result = schema.parse(userData);
What is Zod and Why Use It?
Zod is a TypeScript-first schema validation library that provides runtime type checking and data validation. Unlike TypeScript interfaces which only exist at compile time, Zod schemas validate data at runtime, making them perfect for validating API responses, user inputs, and external data sources. Available on npm and actively maintained on GitHub, Zod automatically infers TypeScript types from schemas, giving you both compile-time and runtime type safety.
Frequently Asked Questions
What's the difference between Zod schemas and TypeScript interfaces?
TypeScript interfaces only provide compile-time type checking, while Zod schemas provide runtime validation. Zod validates actual data at runtime, catches invalid data from APIs or user inputs, and can provide detailed error messages. Zod also automatically generates TypeScript types from schemas using z.infer. You can also generate TypeScript interfaces if you only need compile-time types.
Can I use Zod schemas with React Hook Form or tRPC?
Yes! Zod integrates seamlessly with React Hook Form for form validation and tRPC for end-to-end type-safe APIs. The generated schemas work directly with @hookform/resolvers/zod for React Hook Form and as input/output validators in tRPC procedures.
Does the tool detect email and URL formats automatically?
Yes! The converter intelligently detects email addresses and URLs in your JSON data and automatically adds .email() and .url() validators to the Zod schema for enhanced validation.
How are nested objects handled in Zod schemas?
The tool creates separate Zod schemas for nested objects and properly references them in parent schemas. This creates clean, reusable schemas that can be composed together, following Zod best practices.
Is the JSON to Zod conversion free?
Yes, completely free with no limitations on JSON complexity, file size, or conversion frequency. No registration required, and you can generate unlimited Zod schemas from JSON data at no cost.