JSON to TypeScript Interface Generator

Paste any JSON payload to automatically infer and generate structured TypeScript interfaces and types.

Input JSON

Root Interface Name

Export Interfaces Mark all properties optional (?)

Generated TypeScript Output

0 interfaces

About the JSON to TypeScript Generator

Speed up development by auto-generating type definitions from API responses and sample JSON payloads.

Instant & Client-Side

The JSON to TypeScript Interface Generator is built for developers integrating REST APIs, configuration files, or database records into strongly-typed TypeScript projects. Manually crafting nested type declarations is tedious and error-prone; this utility parses your sample payload instantly to create clean, modular interfaces.

Nested Structure Parsing

Deeply nested objects automatically break down into standalone named interfaces for maximum code reuse.

Array & Type Inference

Accurately identifies primitives, null values, homogenic arrays, and mixed collections.

100% Private & Secure

All JSON transformation logic runs completely inside your browser window—no data is sent to external servers.