JSON to C# Classes Converter
Convert JSON to C# classes online. Generate strongly typed C# models for .NET and Unity projects in seconds.
JSON to C# Classes Converter helps developers turn sample payloads into ready-to-use C# models quickly. Paste JSON, set your root class name, and generate classes with nested objects and arrays mapped to List<T>. You can also include [System.Serializable] for workflows that need Unity-style serialization.
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What is this tool?
JSON to C# Classes Converter helps developers turn sample payloads into ready-to-use C# models quickly. Paste JSON, set your root class name, and generate classes with nested objects and arrays mapped to List<T>. You can also include [System.Serializable] for workflows that need Unity-style serialization.
How to use
- 1.Paste a valid JSON object into the input editor.
- 2.Set a root class name and toggle [System.Serializable] if needed.
- 3.Click Generate classes to build nested C# models.
- 4.Copy the output or download it as a .cs file.
Example
Generate model classes from API payload
Input
{"user":{"id":1,"name":"Jade"},"tags":["seo","tools"]}Output
public class RootObject { public User User { get; set; } public List<string> Tags { get; set; } }Why use it?
When to use a JSON to C# classes generator
Converting payloads into typed models manually is repetitive and error-prone when APIs evolve quickly. A JSON to C# converter reduces setup time by generating property scaffolding directly from real input data, including nested objects and arrays.
This is useful for .NET backends, Unity clients, and integration tests where stable models improve readability and reduce runtime casting. Instead of hand-writing boilerplate, you can start with generated classes and refine naming or nullable rules in your IDE.
The tool is fully client-side, so payload transformation happens in the browser. That makes it practical for rapid prototyping and local debugging when you need model output instantly without adding server dependencies.
Using a dedicated converter page also helps teams standardize model generation workflows. Engineers can share one URL, test sample payload changes, and copy or download classes in a predictable format.
For data workflows, pair this page with JSON Formatter and JSON Diff to validate and compare payloads before generating final C# classes.
FAQ
Does this tool support nested objects and arrays?
Yes. Nested objects become child classes and arrays are mapped to List<T> when element types can be inferred.
Can I include [System.Serializable]?
Yes. Enable the toggle to add [System.Serializable] above each generated class for serialization-friendly workflows.
Can I download the generated classes as a .cs file?
Yes. After generation, use the download button to export the output as a .cs file.