The JSON to TypeScript converter instantly generates TypeScript interfaces from any JSON object or API response. It infers types for nested objects, arrays, optional fields, and union types automatically. Paste a JSON payload and get copy-paste-ready TypeScript interfaces in seconds — no manual type-writing required.
Frequently Asked Questions
What TypeScript constructs does it generate?
Interface declarations with correct types for strings, numbers, booleans, arrays, nested objects, null values, and optional fields marked with the ? modifier.
How are arrays handled?
Arrays are typed as T[] where T is inferred from the array elements. Mixed-type arrays produce a union type such as (string | number)[].
Can it handle deeply nested JSON?
Yes. Nested objects generate child interfaces with descriptive names derived from the property key, keeping the output organized and readable.
Should I use interface or type alias in TypeScript?
Both work for describing object shapes. Interfaces are preferred for public APIs and support the extends keyword. Type aliases are more flexible for union types and primitives.