Stop writing TypeScript interfaces by hand — convert JSON automatically

How many times have you received a JSON response from an API and had to manually write TypeScript interfaces for it? I built a free tool that does it instantly: JSON to TypeScript Converter How it works Paste this JSON: { "id": 1, "name": "Alice", "email": "[email protected]", "address": { "street": "123 Main St", "city": "Springfield", "zip": "62701" }, "orders": [ { "id": 101, "total": 29.99, "status": "shipped" } ] } Get this TypeScript: interface Address { street: string; city: string; zip: string; } interface OrdersItem { id: number; total: number; status: string; } interface Root { id: number; name: string; email: string; address: Address; orders: OrdersItem[]; } It handles: Nested objects (creates separate interfaces) Arrays (infers element types) Mixed types (string | number) Null values (unknown) Why I built this I was building SnapAPI — a tool that creates instant REST APIs from JSON — and kept needing to convert API responses to TypeScript. So I built the converter as a stan