JSON to C# Converter
Convert JSON to C# classes and POCO objects for .NET development
JSON Input
C# Output
What is JSON to C# Converter?
Need C# classes from your JSON? This tool converts your JSON (JavaScript Object Notation) data into C# POCO (Plain Old CLR Object) classes. Perfect for .NET developers who need to deserialize JSON into strongly-typed objects.
According to Microsoft's documentation, strongly-typed classes are essential for JSON deserialization in .NET. Our converter generates clean C# classes with properties, proper naming conventions, and support for nested objects and arrays.
Everything happens in your browser – your data stays private. Generate, copy, and use your C# classes right away in your .NET projects.
What Makes This Tool Different
Automatic Class Generation
We analyze your JSON structure and generate C# classes automatically. Nested objects become separate classes, arrays become List<T>, and properties follow C# naming conventions.
Property vs Field Support
Choose between C# properties (with get/set) or public fields. Properties are the standard for POCO classes and work great with JSON serializers like System.Text.Json.
Nullable Types
Optionally enable nullable reference types for properties that might be null. Perfect for modern C# projects using nullable reference types.
Type Detection
Automatically detects C# types: strings, integers, doubles, booleans. Arrays become List<T> collections, and nested objects become separate classes.
Download C# File
One click to download your C# classes as a .cs file. Drop it into your .NET project and start using it immediately with JSON serializers.
Syntax Highlighting
Nice syntax highlighting makes it easy to check your JSON before converting. Visual feedback helps you spot issues early.
How It Works
Paste or Upload JSON
Paste your JSON object into the left editor, or click "Upload" to load a file. Configure the class name and options (properties, nullable types) in the settings panel. You can also click "Sample" to see an example.
Automatic Conversion
As soon as you paste, the converter processes your JSON and displays the C# classes on the right. Nested objects become separate classes, arrays become List<T>, and properties follow C# naming conventions.
Download or Copy
Click "Download" to save the C# classes as a .cs file, or "Copy" to copy it to your clipboard. The generated classes are ready to use in your .NET project with System.Text.Json or Newtonsoft.Json.
When You'd Actually Use This
API Integration
Generate C# classes from API responses. Perfect for creating DTOs (Data Transfer Objects) when integrating with REST APIs or microservices.
.NET Development
Quickly create POCO classes for JSON deserialization in .NET applications. Works great with ASP.NET Core, Entity Framework, and other .NET frameworks.
Configuration Files
Convert JSON configuration files to strongly-typed C# classes. Makes configuration management type-safe and easier to work with in .NET applications.
Code Generation
Save time by generating C# classes automatically instead of writing them manually. Especially useful for complex nested JSON structures with many properties.
Common Questions
Is my JSON data stored?
Nope. Everything happens right in your browser. Your JSON never leaves your computer – we don't even see it.
What C# features are supported?
The generator creates C# classes with properties (or fields), proper naming conventions (PascalCase), List<T> for arrays, and support for nested objects. You can choose between properties with get/set or public fields, and enable nullable types.
How are nested objects handled?
Nested objects become separate C# classes. Each nested object gets its own class definition, and the parent class references it as a property. Arrays of objects become List<T> where T is the generated class.
Can I customize the generated classes?
Yes! You can change the root class name, choose between properties and fields, and enable/disable nullable types. The generated code follows C# conventions and is ready to use.
What JSON serializers work with these classes?
The generated classes work with both System.Text.Json (built into .NET) and Newtonsoft.Json. Just use JsonSerializer.Deserialize<YourClass>(jsonString).
Does it work with large datasets?
Yes. Since everything happens in your browser, it depends on your device. Small JSON objects convert instantly. Complex nested structures with many properties might take a moment to generate all the classes.
Other Code Generation Tools
Need code in other languages? Here are our other code generation tools:
Need to learn more about C#? Check out Microsoft's C# documentation or the System.Text.Json guide for JSON serialization.