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JSON to C# Class

Generate C# classes from JSON instantly. High-performance tool for .NET developers with support for Newtonsoft.Json and System.Text.Json. Safe browser-side processing.

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Complete JSON Conversion & Utility Tools

Below is a comprehensive list of JSON conversion and utility tools available on Tool Wizard Hub.

JSON → File & Data Formats

JSON → Programming Languages

JSON → Documents & Tables

JSON Utilities

Advanced JSON Tools

About JSON to C# Class

The Ultimate Guide to JSON to C# Class Generation

In modern .NET development, JSON is the standard for data exchange, but C# requires strongly-typed Classes (Models) to leverage the power of the CLR and IntelliSense. Manually mapping complex JSON responses to C# objects is tedious and error-prone. Our JSON to C# Converter automates this process, generating clean, production-ready C# models with support for property attributes, PascalCase naming conventions, and nested class structures.

Why Use a C# Model Generator?

C# is a statically typed language that thrives on structure. Whether you are using ASP.NET Core, Xamarin, or Unity, converting JSON to C# classes provides several critical advantages:

  • Strong Typing: Catch data mismatch errors at compile-time rather than runtime, improving application stability.
  • Auto-Completion: Benefit from full IDE support (Visual Studio, JetBrains Rider) with IntelliSense for all your API data properties.
  • Serialization Support: Generate code that works out-of-the-box with Newtonsoft.Json (Json.NET) and the high-performance System.Text.Json library.
  • Productivity: Transform hundreds of lines of JSON into a complete class hierarchy in a single click.

PascalCase Transformation

Our tool automatically converts snake_case or camelCase JSON keys into C# standard PascalCase properties, adding [JsonPropertyName] attributes where necessary.

Nested Class Hierarchies

Deeply nested JSON objects are intelligently broken down into separate, reusable C# classes to maintain clean and modular code architecture.

100% Data Privacy

Processing happens entirely within your browser. Your sensitive API data never leaves your computer, ensuring total confidentiality for your proprietary structures.

Technical Comparison: JSON vs. C# Class

Feature JSON Structure C# Strongly Typed Class
Typing Dynamic / Loose Static / Strong
Naming Usually camelCase PascalCase (Standard)
Empty Values null Nullable types (T?)
Arrays [ ] List<T> or T[]

Implementing the Output in .NET

Once you have generated your classes, you can easily deserialize your JSON strings using modern .NET libraries. For example, using System.Text.Json:

// Generated Model Usage
string jsonString = await response.Content.ReadAsStringAsync();
var userData = JsonSerializer.Deserialize<RootObject>(jsonString);

Console.WriteLine(userData.UserName);

Frequently Asked Questions

Does this support List and Array types?

Yes. The generator automatically detects JSON arrays and maps them to List<T> or arrays in C#, depending on the structure and nesting depth.

Can I use this for .NET Core and .NET 8/9?

Absolutely. The generated classes use standard C# syntax that is compatible with all modern versions of .NET, including .NET Core, .NET 5+, and legacy .NET Framework.

How are nullable JSON values handled?

Our tool identifies fields that may contain nulls and allows you to implement nullable reference types or specific C# nullable types to prevent NullReferenceException.

Is there a limit to the JSON size for generation?

The converter is optimized for performance and can handle large, complex JSON files. The only limit is the memory available in your local browser environment.