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Instantly convert raw JSON objects, API response payloads, and database records into clean TypeScript interfaces, type aliases, and Zod runtime validation schemas. Includes smart type inference, optional field controls, live argument testing, and 100% browser-local privacy.
Instant client-side type inference & runtime schema generator
// ==========================================
// 1. TypeScript Interface Definition
// ==========================================
export interface UserProfile {
id: string;
username: string;
email: string;
isActive: boolean;
age: number;
roles: string[];
profile: UserProfile_Profile;
metadata: UserProfile_Metadata;
}
// ==========================================
// 2. Zod Runtime Validation Schema
// ==========================================
import { z } from "zod";
export const userProfileSchema = z.object({
id: z.string(),
username: z.string(),
email: z.string(),
isActive: z.boolean(),
age: z.number(),
roles: z.array(z.string()),
profile: z.object({
firstName: z.string(),
lastName: z.string(),
avatarUrl: z.string(),
bio: z.any(),
socials: z.object({
github: z.string(),
twitter: z.string(),
}),
}),
metadata: z.object({
lastLogin: z.string(),
loginCount: z.number(),
}),
});
export type UserProfile = z.infer<typeof userProfileSchema>;Paste candidate JSON argument output (e.g. from an LLM tool call or API response) to verify whether it matches the inferred TypeScript / Zod type signature.
Click "Validate Payload" above to inspect candidate JSON against the generated schema.
Paste your raw JSON response or select a pre-built preset (User Profile, E-Commerce Order, or AI Tool Payload). Auto-repair fixes missing quotes or trailing commas.
Name your root interface/schema, select export format (Interface, Type Alias, Zod Schema, or Both), and toggle optional (`?`) or readonly properties.
Copy formatted TypeScript and Zod code blocks directly to your clipboard, test sample argument payloads against type guards, or download `.ts` source files.
Zero server network requests. Your API payloads, database models, and proprietary JSON structures stay 100% inside your browser memory.
Generate both standard TypeScript interfaces/type aliases and Zod runtime validation schemas (`z.object({...})`) simultaneously.
Recursively inspects nested JSON objects, arrays, primitives, nullables, and unions to produce precise type signatures.
Configure root interface name, toggle optional property flags (`?`), choose interface vs type alias syntax, and format casing.
Test sample candidate JSON payloads against inferred type guards or Zod schema constraints with real-time diagnostic output.
Copy formatted TypeScript / Zod code blocks to your clipboard or download ready-to-import `.ts` files with one click.
Our JSON to TypeScript & Zod Schema Generator is open source under HiMat Technology. Inspect type parsing logic, submit PRs, or star the repository on GitHub.
Unlike traditional cloud utilities that transmit API request payloads or database schemas across the network, HiMat's JSON to TypeScript & Zod Schema Generator runs 100% locally in your web browser. Neither your JSON structure, sensitive user fields, nor generated code leave your device.
Our browser-local parser recursively analyzes your input JSON payload, identifies object properties and primitive types (string, number, boolean, array, null), and generates corresponding TypeScript interface definitions and Zod validation schemas in real time.
No. The HiMat JSON to TypeScript & Zod Schema Generator operates 100% locally in your web browser. Neither your input JSON, field names, nor generated TypeScript files are ever sent over the network.
Zod enables runtime validation for API requests, Next.js Server Actions, tRPC routers, and LLM structured output functions. Static TypeScript types disappear at compile time, whereas Zod schemas enforce type safety at runtime.
Yes! The converter automatically creates nested interface declarations for sub-objects and infers array element types (including primitive arrays and array of objects).
Yes, 100% free with no registration required, no daily rate limits, and zero advertisements.
HiMat Technology builds production Next.js App Router applications, tRPC & GraphQL API backends, Zod-validated microservices, and custom AI agent workflows with end-to-end source code ownership.
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