Developer · Jul 1, 2026 · 3 min

JSON to TypeScript Converter — Generate Typed Interfaces Instantly

Convert JSON objects to TypeScript interfaces or type aliases automatically. Handles nested objects, arrays, nullable fields, and optional properties.

Typing API responses by hand is tedious and error-prone. The JSON to TypeScript converter does it automatically: paste any JSON object, click Generate, and get a properly typed TypeScript interface. Nested objects become nested interfaces. Arrays are typed as T[]. Null values are typed as null.

Use Case: API Integration

Copy an API response from your browser's Network tab or Postman. Paste it into the converter. Get a complete TypeScript interface you can paste directly into your codebase. Cut API integration time from 10 minutes to 10 seconds.

Generate TypeScript interfaces from JSON.Convert →