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JSON to C# Class Converter

Paste or fetch JSON data and generate clean, strongly typed C# classes instantly.

🔽 JSON Input

JSON

🧾 C# Class Output

CSHARP

Instant Conversion

Convert your data in real-time as you type. No delays, no waiting.

100% Private

All processing happens in your browser. Your data never leaves your device.

Always Free

No hidden fees, no premium plans. All features are completely free forever.

Convert JSON to C# Class Online – Free JSON to C# Model Generator

Generate strongly typed C# classes from JSON instantly. Free online JSON to C# class converter supporting nested objects, arrays, and .NET model generation.

What Is a JSON to C# Class Converter?

A JSON to C# Class Converter is an online tool that transforms structured JSON data into strongly typed C# model classes automatically. Developers commonly use it when working with APIs, ASP.NET Core, Web APIs, Blazor applications, and .NET backend services. This JSON to C# class generator creates clean C# models with proper property types, nested objects, and list handling — directly in your browser without sending data to any server.

Generate Strongly Typed C# Models Instantly

Convert JSON into clean, structured C# classes with correct data types including string, int, double, bool, nested objects, and lists.

Built for .NET & ASP.NET Developers

Perfect for ASP.NET Core Web APIs, MVC applications, Blazor projects, and backend services consuming JSON APIs.

Handles Nested Objects & Arrays

Automatically generates child classes and List<T> properties for complex JSON structures with nested objects and arrays.

Why Use an Online JSON to C# Class Generator?

1

Save Development Time

Manually writing C# classes for large JSON responses is time-consuming and error-prone. Instantly generate models and focus on business logic instead.

2

Avoid Type Mapping Errors

Automatically map JSON types to proper C# types such as string, int, double, bool, and List<T> without guessing.

3

Perfect for API Integration

When consuming REST APIs in .NET, you need accurate model classes. Convert JSON API responses directly into C# models for deserialization.

4

Works Fully in Your Browser

Your JSON data never leaves your browser. Convert JSON to C# securely without uploading files to external servers.

When Should You Convert JSON to C#?

1

Building ASP.NET Core Web APIs

Generate request and response models quickly when building or consuming APIs in ASP.NET Core applications.

2

Consuming Third-Party APIs

Paste API response JSON and instantly generate C# classes to deserialize responses using System.Text.Json or Newtonsoft.Json.

3

Working with Blazor Applications

Convert JSON into strongly typed models for binding data in Blazor Server or WebAssembly applications.

4

Enterprise Backend Development

Large enterprise systems rely on structured models. Generate accurate C# classes for internal microservices and backend systems.

5

Rapid Prototyping

Quickly create model classes during development or testing without manually defining each property.

How to Convert JSON to C# Class Online

1

Paste Your JSON Data

Copy JSON from an API response or data file and paste it into the input editor. 

{
  "id": 1,
  "name": "Sourav",
  "isActive": true
}
2

Click the convert button to instantly generate strongly typed C# classes.

The tool automatically generates a TypeScript interface in the right panel. It detects types, handles nested objects, and creates proper interface names. 

public class RootObject
{
    public int Id { get; set; }
    public string Name { get; set; }
    public bool IsActive { get; set; }
}
3

Copy or Download the C# Model

Copy the generated C# class or download it as a .cs file for your .NET project.

Pro Tips

  • •Always validate JSON before generating C# classes.
  • •Review numeric types (int vs double) if API values may change.
  • •Use nullable reference types in modern .NET projects.
  • •Add JsonPropertyName attributes if JSON property names differ from C# naming conventions.
  • •Use List<T> for arrays when deserializing API responses in ASP.NET Core.

Frequently Asked Questions

Everything you need to know about JSONtoAll tools.

What is a JSON to C# Class Converter?
A JSON to C# Class Converter is an online tool that generates strongly typed C# model classes from JSON data. It automatically maps JSON properties to C# properties, including nested objects and arrays.
How do I generate a C# class from JSON?
Simply paste your JSON into the input editor and click convert. The tool instantly generates a C# class with proper property types like string, int, bool, double, and List<T>.
Can this tool generate C# models for ASP.NET Core?
Yes. The generated C# classes are fully compatible with ASP.NET Core Web APIs, MVC applications, and backend .NET services.
Does the JSON to C# converter support nested objects?
Yes. The tool automatically creates separate child classes for nested JSON objects and maps them correctly inside the parent class.
How are JSON arrays converted to C#?
JSON arrays are converted into List<T> properties in C#. If the array contains objects, the tool generates a corresponding child class automatically.
Is the generated C# class compatible with System.Text.Json?
Yes. The generated C# models can be used directly with System.Text.Json or Newtonsoft.Json for deserialization.
Does this tool handle large JSON files?
Yes. The JSON to C# class generator supports large and deeply nested JSON structures while preserving accuracy.
Can I use the generated C# class for API deserialization?
Absolutely. The generated model classes are ideal for deserializing API responses in .NET applications.
Does the JSON to C# converter map numeric types correctly?
Yes. The tool automatically detects integers and floating-point numbers and maps them to int or double in C#.
Is this JSON to C# class generator free to use?
Yes. The tool is completely free and works directly in your browser without requiring signup.
Can I download the generated C# class as a .cs file?
Yes. You can copy the output or download it as a .cs file for use in your .NET project.
Does the tool validate JSON before generating C# classes?
Yes. Invalid or malformed JSON is detected automatically, preventing incorrect C# model generation.
Can I customize the root class name?
Yes. You can specify a custom root class name instead of the default RootObject.
Does this tool work for Blazor applications?
Yes. The generated C# classes can be used directly in Blazor Server or Blazor WebAssembly projects.
Why should I use an online JSON to C# converter instead of writing classes manually?
Manually writing C# classes for large JSON responses is time-consuming and error-prone. This tool saves development time and ensures accurate type mapping.
Does the converter support nullable types in C#?
Yes. Modern C# projects using nullable reference types can easily adapt the generated models.
Is my JSON data uploaded to a server?
No. The JSON to C# conversion happens entirely in your browser, ensuring privacy and security.
Can I generate multiple C# classes from complex JSON?
Yes. If your JSON contains nested objects or arrays of objects, the tool generates multiple related C# classes automatically.
Is this tool suitable for enterprise .NET development?
Yes. The JSON to C# class generator is useful for enterprise backend systems, microservices, and API-driven applications.
What is the difference between JSON and a C# model class?
JSON is a data interchange format, while a C# model class defines a strongly typed structure in .NET used for deserialization and business logic handling.

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Ready to Convert JSON to C# Classes?

Transform JSON into strongly-typed C# models for .NET applications. Instantly generate clean, production-ready class files with minimal effort.