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JSON to Zod: Runtime Type Validation
Convert JSON to Zod schemas instantly. Zod is the gold standard for TypeScript-first schema declaration and validation, ensuring your runtime data matches your types perfectly.
- Runtime Safety: Validates untrusted API data before it hits your app.
- Type Inference: Zod automatically generates TypeScript types from schemas.
- Flexible: Supports optional fields, unions, and complex object structures.
The Modern TS Stack
Leverage the power of Zod to build extremely robust TypeScript applications. Our converter takes any JSON payload and builds the equivalent Zod schema, complete with nested objects and array validation, saving you from tedious manual schema writing.
JSON to Zod Conversion Guide
Why Use Zod Schemas?
Zod is a TypeScript-first schema declaration and validation library. Converting JSON to Zod schemas allows you to validate untrusted data at runtime while automatically inferring static TypeScript types, providing a double layer of safety.
Core features:
- Runtime Validation: Safely parse API responses and form data.
- Type Inference: No need to write separate TypeScript interfaces.
- Developer Friendly: Concise syntax with expressive error messages.
- Zero Dependencies: Lightweight and compatible with all environments.
Zod Schema Basics
Object Validation
import { z } from "zod";
const UserSchema = z.object({
id: z.number(),
name: z.string(),
});Array Validation
const ItemsSchema = z.array( z.string().email() );
Best Practices
Strict Schemas
Use .strict() to prevent unrecognized keys from passing validation.
Custom Errors
Define helpful error messages directly in your schema definitions.
Partial Sync
Use .partial() to easily create schemas for PATCH request updates.
JSON to Zod Examples
API Response Schema
JSON API Source
{
"api_key": "sk_test_123",
"limits": {
"requests": 1000,
"burst": 50
},
"endpoints": ["/v1", "/v2"]
}Generated Zod
import { z } from "zod";
const LimitsSchema = z.object({
requests: z.number(),
burst: z.number()
});
const ApiConfigSchema = z.object({
api_key: z.string(),
limits: LimitsSchema,
endpoints: z.array(z.string())
});
type ApiConfig = z.infer<typeof ApiConfigSchema>;User Preference Validation
Preferences JSON
{
"theme": "dark",
"notifications": {
"email": true,
"push": false
},
"language": "en-US"
}Generated Zod
const NotificationsSchema = z.object({
email: z.boolean(),
push: z.boolean()
});
const UserPrefsSchema = z.object({
theme: z.string(),
notifications: NotificationsSchema,
language: z.string()
});Frequently Asked Questions
Is my data safe with this JSON tool?
Yes. This tool uses 100% client-side processing. Your JSON data never leaves your browser and is never sent to our servers, ensuring maximum privacy and security.
What is Zod and why use it with JSON?
Zod is a TypeScript-first schema declaration and validation library. Converting your JSON to a Zod schema allows you to strictly validate external data at runtime while gaining automatic Type inference for your development.
Does it support Zod 3.x syntax?
Yes, our generator produces modern Zod 3.x schema code, supporting primitives (string, number, boolean), objects, arrays, and complex nested structures encountered in your JSON data.
How does type inference work with the generated schema?
Once the schema is generated, you can use `z.infer
Related Reading
Accelerating TypeScript Development: JSON to Zod Schema
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JSON for AI Function Calling: A Practical Guide
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How to Format JSON in TypeScript
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