JSON to TypeScript Interface & Type Generator

Convert JSON objects into clean TypeScript interfaces or type aliases. Automatically infers nested objects, array element types, and optional properties.

Input JSON Payload:
Samples:
Root Name:
Declaration:
Generated TypeScript Types:
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Why Generate TypeScript Interfaces Automatically?

Manually authoring TypeScript types for complex REST API JSON responses is tedious and prone to typos. Generating interfaces automatically gives you instant IDE autocomplete, compile-time type safety, and prevents undefined property bugs.

Key Type Inference Rules