JSON to TypeScript Converter - Schema Generator
API returns JSON and you need TypeScript types? This schema generator analyzes JSON structure and outputs TypeScript interfaces, Zod validation schemas, or Go structs instantly. Paste messy API responses, get clean, typed code. Perfect for integrating third-party APIs, validating user input, or migrating JavaScript to TypeScript. Free, offline-capable, no server upload. Use JSON To Typescript when you need answers fast during debugging, reviews, or incident triage. Paste your input, validate the output, then copy results into tickets or docs in seconds. Most processing runs in your browser, so you can test safely without unnecessary data exposure. Built for speed, clarity, and repeat use.
Paste JSON to generate schema...
How to Generate Schemas from JSON
- Paste JSON data - API response, config file, or any JSON object
- Select output format - TypeScript, Zod, Go, or JSON Schema
- Customize settings - Optional vs required fields, naming conventions
- Copy generated code - Ready to use in your project
Why Schema Generation Matters
TypeScript interfaces from JSON: The tool parses JSON recursively, infers types (string, number, boolean, arrays, nested objects), and generates corresponding TypeScript: interface User { name: string; age: number; tags: string[]; }. This eliminates manual typing and catches type errors at compile time.
Zod for runtime validation: TypeScript types disappear at runtime - they can't validate data from APIs or user input. Zod schemas provide runtime type checking: z.object({ name: z.string(), age: z.number() }). This tool generates Zod from JSON examples, catching malformed API responses before they crash your app.
Pro tip: Use representative JSON samples - include all possible fields and value types. For optional fields, the tool infers from presence/absence. For union types (string | number), provide examples with both types. Generate schemas during API integration, then version control them to catch breaking API changes.