JSON to TypeScript

Typing API responses and config objects by hand is tedious. A JSON-to-TypeScript tool infers types from sample data and generates interfaces or type aliases. Paste a JSON sample—API response, config, webhook payload—and get TypeScript definitions. Supports optional properties, unions, and nested structures. Also outputs Python, Go, Java, and more. Use cases: typing API clients, generating DTOs, documenting schemas, onboarding new endpoints. One paste, instant types. No server upload.

{"id":1,"email":"a@b.com","roles":["admin"]}

interface Root { id: number; email: string; roles: string[]; }