Five languages, one input
Generate C# classes, TypeScript interfaces, Kotlin data classes, Python dataclasses and Go structs.
API Model Forge
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.

WHAT IT DOES
API Model Forge keeps the workflow focused, from the first input to a result you can review.
Generate C# classes, TypeScript interfaces, Kotlin data classes, Python dataclasses and Go structs.
Handle nested data, mixed object shapes and nullable fields. Invalid JSON gets a precise line and column location.
Choose a root type name, switch language tabs, then copy the result or save a generated file.
LOCAL BY DESIGN
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.