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JSON to TypeScript, Go, C#, Dart & Kotlin Type Generator

Paste any JSON response payload to instantly generate strongly typed data models and interface definitions for TypeScript, Go, C#, Dart, and Kotlin. Perfect for frontend and backend API contract development.

Key Technical Capabilities

  • 5 Target LanguagesExport TypeScript interfaces, Go structs with json tags, C# classes, Dart models, or Kotlin data classes.
  • Recursive Nested TypesAutomatically detects sub-objects and arrays to create clean referenced interfaces.

How to Generate Types from JSON

  1. Paste JSON PayloadPaste your sample JSON API response into the editor.
  2. Select Target LanguageChoose TypeScript, Go, C#, Dart, or Kotlin.
  3. Copy Generated CodeCopy the complete type definitions straight into your IDE project.

Frequently Asked Questions

Does this detect optional nullable fields?
Yes, analyzing arrays with missing fields marks those properties as optional.