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API Model Forge

From JSON to a better starting point.

Turn a JSON object or saved API response into typed models for C#, TypeScript, Kotlin, Python and Go. One shared type tree handles nested objects, arrays and nullable values. Name the root, review the output, then copy or save the generated code.

Windows 10 / 11 · x64Open source · MIT
API Model Forge running on Windows with demonstration data
REAL APPLICATION / WINDOWSView full size ↗

WHAT IT DOES

A clear task.
A considered set of tools.

API Model Forge keeps the workflow focused, from the first input to a result you can review.

01 / CAPABILITY

Five languages, one input

Generate C# classes, TypeScript interfaces, Kotlin data classes, Python dataclasses and Go structs.

02 / CAPABILITY

Structure, inferred

Handle nested data, mixed object shapes and nullable fields. Invalid JSON gets a precise line and column location.

03 / CAPABILITY

Ready for your editor

Choose a root type name, switch language tabs, then copy the result or save a generated file.

From input to output.

  1. Paste or load JSON
  2. Choose a root name
  3. Review typed models
  4. Copy or save code

LOCAL BY DESIGN

Your workflow.
Your machine.

Paste JSON or load a local file. Generation happens entirely on your machine, without network calls, accounts or telemetry. The app does not fetch API responses for you.