JSON to C# Online - Free & Local

JSON to C# is a free ComTools utility that convert json to c# class/record with nullable and attributes. Data is processed locally in your browser; nothing is uploaded.

Nullable types Use record JsonPropertyName

Input

Output

6 uses

What is JSON to C#?

JSON to C# is a free ComTools utility that convert json to c# class/record with nullable and attributes. Data is processed locally in your browser; nothing is uploaded.

Features

Free to use
No signup required
Local processing
Data is processed locally in your browser; nothing is uploaded.
Bilingual UI
Chinese and English supported
Developer friendly
Convert JSON to C# class/record with nullable and attributes

Use cases

Daily development
Data conversion
Learning and demos
Quick format checks

How to use

Open the tool page
Enter or upload your data
Click the action button
Copy or download the result

FAQ

QIs my data uploaded?

Data is processed locally in your browser; nothing is uploaded.

QIs it free?

Yes, completely free with no usage limits.

QWhich browsers are supported?

Modern browsers: Chrome, Edge, Firefox, Safari.

QHow to report issues?

See the About page for contact options.

JSON to C# class guide

Mapping JSON to C# classes speeds up API integration. Property names become PascalCase fields with nested classes and List<T> for arrays.

public class User
{
    public string Name { get; set; }
    public int Age { get; set; }
}