JSON → Code Models

Paste JSON and generate models in Python, TypeScript, Go, Java, C#, Kotlin, Swift, or Rust.

Input JSON

Editable JSON with syntax highlighting. Supports objects and arrays.

JSON

Root name

Output format

Mark all fields optional

Output

Generated code

Tips

How types are inferred

Numbers with a decimal point become float/number; integers remain int.
YYYY-MM-DD strings are treated as date-like (mapped to date or string by target language).
Null values make the field optional/nullable where supported.
Empty arrays become generic arrays (e.g., List[Any], any[]).
Nested objects become nested types with PascalCase names derived from keys.
Arrays of objects: If your JSON starts with an array, the tool will generate a model for the array elements.