JSON to C# Class Converter

Generate clean, strongly-typed C# classes from your JSON data instantly. Online JSON to C# Entity Class Tool, supports Newtonsoft.Json and System.Text.Json

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Smart Type Inference

Automatically detects DateTime, Guid, long, double, and complex nested objects.

Highly Customizable

Support for C# 9 records, nullable types, and popular serialization attributes.

100% Client-Side

Your data never leaves your browser. All conversion happens locally for maximum privacy.

How to Convert JSON to C# Classes?

Converting JSON to C# is a common task for .NET developers when working with APIs. Our tool makes it effortless:

  1. Paste JSON: Enter your JSON data into the left editor.
  2. Set Options: Choose your namespace, class names, and preferred C# features.
  3. Copy Result: Instantly get well-formatted C# code on the right.
  4. Download: Export the result as a `.cs` file directly into your project.

Powerful Features for .NET Developers

Newtonsoft.Json Support

Automatically adds `[JsonProperty("name")]` attributes for compatibility with the most popular JSON library.

System.Text.Json Support

Supports the modern .NET JSON library with `[JsonPropertyName("name")]` attributes.

C# 9 Record Types

Optionally generate `public record ClassName(...)` for immutable data structures.

Nullable Reference Types

Full support for `string?` and other nullable annotations introduced in C# 8.0.

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