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. Check out the JSON for more details.
How to Use JSON to C#
Follow these steps to generate C# classes from JSON. Each step uses the actual buttons and panels on this page.
Paste JSON or Upload File
Paste your JSON into the left JSON Input panel, or click Upload to load a file. Click Sample to see an example. Example input:
{"subscriberId": "SUB-1001", "plan": "Unlimited 5G", "dataUsage": 45.2, "status": "active"}Configure class name and options (properties vs fields, nullable types) if needed. Nested objects become separate classes; arrays become List<T>.
View Generated C# Classes
The right C# Output panel shows the generated classes. Properties use PascalCase; nested structures get separate classes. Compatible with System.Text.Json and Newtonsoft.Json. Both panels use syntax highlighting.
Download or Copy
Click Download to save as a .cs file, or Copy to copy to your clipboard. Use Clear on the input panel to start over. All processing runs in your browser.
When You'd Actually Use This
.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. Check out the ECMA-404 standard for more details.
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: