C# Output
Ready to Generate C# Classes
Paste JSON in the left panel or load a sample to get started
JSON to C# Classes Generator
Generate strongly-typed C# classes from JSON data — with smart type inference and serialization attributes
How to Convert JSON to CSharp Classes – Step by Step
Use our free JSON to CSharp generator to produce strongly-typed class definitions in four simple steps
1
Step 1 – Paste Your JSON Data
Paste any JSON into the left panel of our JSON to CSharp converter — API responses, config files, database exports, you name it. The editor validates syntax in real time so you know immediately if something looks off.
Multiple Input Sources: API responses, config files, or raw JSON from any source
Real-time Validation: Syntax errors are highlighted instantly before conversion
Nested Structure Support: Handles deeply nested objects and arrays of objects
Sample JSON Input
{
"id": 123,
"name": "John Doe",
"isActive": true,
"address": {
"street": "123 Main St",
"city": "Springfield"
}
}2
Step 2 – Configure JSON to CSharp Options
Choose your root class name, target serialization library (System.Text.Json or Newtonsoft.Json), and whether to include nullable types. The JSON to CSharp generator applies your options immediately.
Root Class Name: Customize the name of the top-level generated class
Serialization Library: Pick System.Text.Json or Newtonsoft.Json attribute style
Nullable Types: Enable int?, double?, bool? for null-safe .NET 6+ projects
Choose your serialization framework
3 Options
System.Text.Json
Modern .NET default
Newtonsoft.Json
Classic & widely used
Nullable Types
Null-safe C# 8+
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Step 3 – Review Generated CSharp Classes
The JSON to CSharp converter generates class definitions instantly in the right panel with PascalCase properties, proper type inference, and serialization attributes. Nested JSON objects become separate CSharp classes automatically.
Instant Generation: Classes are updated as you type — zero waiting
Smart Type Mapping: int, long, double, bool, string, List<T> — all inferred correctly
Clean Formatting: Consistent indentation and C# property syntax throughout
Generated C# Output
public class Root
{
[JsonPropertyName("id")]
public int Id { get; set; }
[JsonPropertyName("name")]
public string Name { get; set; }
[JsonPropertyName("isActive")]
public bool IsActive { get; set; }
[JsonPropertyName("address")]
public Address Address { get; set; }
}
public class Address
{
[JsonPropertyName("street")]
public string Street { get; set; }
[JsonPropertyName("city")]
public string City { get; set; }
}4
Step 4 – Copy or Download .cs File
Copy the JSON to CSharp output to clipboard or download a ready-to-use .cs file. Drop it straight into your .NET project and start deserializing JSON with full type safety provided by the generated CSharp classes.
Download .cs File: Get a properly named C# source file for your project
Copy to Clipboard: One-click copy for pasting directly into Visual Studio or Rider
IDE Ready: Works seamlessly with Visual Studio, VS Code, and JetBrains Rider
Export C# classes for your .NET project
3 Options
Download .cs
Save C# source file
Copy Code
Copy to clipboard
IDE Ready
VS, VS Code, Rider
JSON to C# Converter FAQs
Common questions about using the JSON to C# class generator
Converting JSON to CSharp classes gives you strongly-typed models with IntelliSense support, compile-time error detection, and seamless JSON deserialization. Instead of working with dynamic objects or anonymous types, our JSON to CSharp generator creates proper class hierarchies that integrate perfectly with ASP.NET Core, Entity Framework, and the rest of the .NET ecosystem.
System.Text.Json is the built-in JSON library shipped with .NET Core 3+ and uses [JsonPropertyName] attributes. Newtonsoft.Json (Json.NET) is the popular third-party library that uses [JsonProperty] attributes and offers more advanced features like custom converters. Our generator supports both — choose based on which library your project already uses.
Nested JSON objects are automatically converted into separate CSharp class definitions by our JSON to CSharp tool. For example, an "address" object inside a user object becomes a standalone Address class, and the User class gets a typed Address property. Array properties become List<T> with the proper element type inferred from the array contents.
Yes. When "Nullable Types" is enabled, JSON null values produce nullable C# types such as int?, double?, and bool?. String remains non-nullable by default since it is already a reference type in C#. This is particularly useful for .NET 6+ projects with nullable reference types enabled in the project settings.
The CSharp classes generated by our JSON to CSharp converter follow standard conventions with PascalCase property names, proper getter/setter syntax, and serialization attributes. They are ready to drop into any .NET project. For complex scenarios like custom converters, inheritance, or discriminated unions you may need to extend the generated CSharp code manually.
Completely. All JSON to CSharp conversion happens locally in your browser using JavaScript — no data is ever sent to a server. Your JSON input never leaves your machine, making this JSON to CSharp tool safe for sensitive API payloads, configuration files, or proprietary data structures.
JSON EDITOR
Edit, format, and beautify JSON
JSON VALIDATOR
Validate, fix, and inspect JSON
JSON ANALYZER
Compare, measure, and map JSON
EXPORT & SHARE
Convert JSON to other formats
IMPORT TO JSON
Convert other formats to JSON
CODE & FORMATTERS
Generate code and format other languages