Generate typed class definitions from JSON for TypeScript, C#, Java, and Python online. Free JSON to class generator — handles nested objects. No signup required.
Manually writing typed classes or interfaces from a JSON schema is tedious and error-prone, especially for large nested objects returned by third-party APIs. This generator reads your JSON and outputs ready-to-use class definitions for TypeScript, C#, Java, or Python, saving significant boilerplate writing time when integrating with external APIs.
All processing for JSON to Class Generator runs entirely in your browser. Your data — whether text, files, or other content — is never transmitted to any server. DevToolHub has no backend that receives or stores your inputs. This means the tool works even offline once the page has loaded, and there is no risk of your data being intercepted or stored by a third party.
What language is the output code in?
The output is generic pseudo-code easily adapted to most object-oriented languages. It maps to TypeScript string arrays, Java/C# List of String, or Python list of str type hints.
How does it handle arrays with different types of objects?
The generator infers the array type from the first element it encounters. If the array is empty or contains mixed types, it may default to a generic type. Always review the generated code for heterogeneous arrays.
Can it handle deeply nested JSON?
Yes. The generator recurses through nested objects and creates a separate class for each distinct nested structure, mirroring how most object-oriented languages model composition.
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