JSON to C# Class Converter

Convert JSON data into C# classes with PascalCase properties, JsonPropertyName attributes, and nested type inference

Key Facts

Category
Developer & Web
Input Types
textarea, text, checkbox
Output Type
text
Sample Coverage
4
API Ready
Yes

Overview

The JSON to C# Class Converter simplifies .NET development by instantly transforming raw JSON payloads into strongly-typed C# classes. It automatically infers nested types, generates PascalCase properties, applies JsonPropertyName attributes for seamless serialization, and supports nullable properties to match your API specifications.

When to Use

  • •When integrating external REST APIs into a .NET application and you need to quickly generate Data Transfer Objects (DTOs).
  • •When modeling complex, deeply nested JSON payloads into structured C# classes without manual typing.
  • •When configuring System.Text.Json serialization with proper property mapping attributes and nullable type safety.

How It Works

  • •Paste your raw JSON payload into the JSON Input field.
  • •Specify the Root Type Name for your main class and toggle the Nullable Properties option if your API contains optional fields.
  • •Click convert to generate the C# class structure with PascalCase properties and JsonPropertyName attributes.

Use Cases

Generating DTOs for HttpClient API integrations in ASP.NET Core projects.
Creating configuration binding classes for appsettings.json files.
Mapping third-party webhook payloads to strongly-typed C# models.

Examples

1. Generating API Response DTOs

Backend Developer
Background
A developer is integrating a third-party weather API that returns a complex JSON payload with nested coordinates and daily forecasts.
Problem
Manually writing C# classes for a nested 50-line JSON response is tedious and prone to naming mismatches during deserialization.
How to Use
Paste the weather API JSON response into the input area, set the Root Type Name to 'WeatherResponse', and enable Nullable Properties.
Example Config
Root Type Name: WeatherResponse, Nullable Properties: True
Outcome
A set of clean C# classes with PascalCase properties, matching JsonPropertyName attributes, and nullable types for optional fields.

2. Mapping App Configuration Files

DevOps Engineer
Background
An engineer needs to bind a custom JSON configuration file to a strongly-typed options class in a .NET worker service.
Problem
The configuration JSON uses camelCase keys, which need to be mapped to standard C# PascalCase properties without losing binding compatibility.
How to Use
Input the configuration JSON, set the Root Type Name to 'AppConfig', and leave Nullable Properties unchecked.
Example Config
Root Type Name: AppConfig, Nullable Properties: False
Outcome
A C# class structure named AppConfig with properties decorated with JsonPropertyName attributes matching the camelCase JSON keys.

Try with Samples

json
Terraform Plan JSON Samples
Sample Terraform plan JSON files exported from terraform show -json style payloads for dependency visualization and change review
title token json
json
Chat Transcript JSON Samples
JSON examples for multi-role chat transcripts
title token json
json
JSON Samples
JSON (JavaScript Object Notation) format examples from simple to complex structures
title token json
json
Rich Media JSON Samples
JSON examples for popular rich text editors (TipTap, Quill, Slate)
title token json
json

Related Hubs

JSON Interchange and Format Translation Tools
Compare JSON conversion tools for CSV, YAML, TOML, GraphQL, XML, Markdown, Excel, BSON, EDN, and related structured formats in one hub.
JSON Inspection, Diff, and Transformation Tools
Compare JSON formatting, diffing, path inspection, schema validation, merging, transformation, and export tools in one hub for API and data workflows.
JSON Schema, Mock Data, and API Fixture Generators
Curated tools for JSON schema generation, mock payload building, and API fixture preparation in one hub.
JSON Formatting, Diff, and Normalization Tools
Compare JSON formatting, diffing, log review, config comparison, and data-normalization tools in one hub for readable and reviewable JSON workflows.

FAQ

Does the converter support nested JSON objects?

Yes, it automatically detects nested objects and arrays, generating separate, strongly-typed C# classes for them.

What JSON serializer attributes are generated?

The converter generates JsonPropertyName attributes to map original JSON keys to PascalCase C# properties.

Can I make the generated properties nullable?

Yes, enabling the Nullable Properties option adds the ? modifier to C# types to handle optional JSON fields.

What is the default name of the main generated class?

The default root class name is 'Root', but you can customize this using the Root Type Name configuration field.

Does this tool support C# record types?

The tool generates standard C# classes with properties, which can be easily adapted to records or structs in your codebase.

API Documentation

Request Endpoint

POST /en/api/tools/json-to-csharp

Request Parameters

Parameter Name Type Required Description
jsonInput textarea Yes -
rootName text No -
optionalFields checkbox No -

Response Format

{
  "result": "Processed text content",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Text: Text

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-json-to-csharp": {
      "name": "json-to-csharp",
      "description": "Convert JSON data into C# classes with PascalCase properties, JsonPropertyName attributes, and nested type inference",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=json-to-csharp",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

If you encounter any issues, please contact us at [email protected]