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JSON to C# Class Converter

JSON to C# Class Converter

Convert JSON data into strongly typed C# classes and records with System.Text.Json or Newtonsoft.Json serialization attributes for .NET applications.

Root Class Name:
Namespace:
JSON Serializer:
Use C# Records (Immutable DTO):
Valid Syntax

Quick Answer & Understanding Your Result

Source: Microsoft Learn - C# Programming Guide

A JSON to C# Class Converter transforms JSON data into strongly typed C# classes and records, pre-configured with System.Text.Json or Newtonsoft.Json serialization attributes.

Core C# / .NET Features (C# 12 & .NET 8/9)

  • Modern Auto-Properties: Employs clean public Type PropertyName { get; set; } with PascalCase naming conventions.
  • System.Text.Json Integration: Pre-annotates properties with [JsonPropertyName("key")] for high-performance .NET serialization.
  • Nullable Reference Types: Supports C# nullability annotations (string?) and list collections (List<T>).

.NET & ASP.NET Core Applications

  • ASP.NET Core Web API Controllers: Typing request and response DTOs for [FromBody] controller actions.
  • Entity Framework Core (EF Core): Structuring data transfer models and complex database types.

Paste your JSON payload above to generate clean C# class code instantly.

Formula & Calculation Logic

Technical Specification & AST
Mathematical Formula
C# Class
= "public class " + ClassName + " n" + Fields.map(f ⇒ " [JsonPropertyName("" + f.jsonKey + "")]n public " + f.type + " " + f.name + " get; set; ").join("n") + "n"

C# type synthesis:

  • Maps JSON strings to string, integers to int / long, floats to double, booleans to bool, and arrays to List<T>.

Step-by-Step Guide

1

Paste JSON Payload

Paste raw JSON data into the editor.

2

Set C# Class Name

Enter target class name (e.g. `UserModel` or `OrderDTO`).

3

Copy C# Code

Copy generated class code directly into your Visual Studio / .NET project.

Worked Examples Table

ExampleInput ValuesCalculated ResultExplanation
User JSON to C# Class
Root Name: User, Json: { "user_id": 10824, "username": "dotnet_architect", "is_active": true, "account_balance": 1540.75, "endpoints": [ "https://api.fnct.net/v1", "https://backup.fnct.net" ], "metadata": { "created_at": "2026-08-19T00:00:00Z", "ip_address": "192.168.1.1", "login_count": 42 } }, Namespace: Fnct.Models, Serializer: system_text_json, Use Records: false
using System.Text.Json.Serialization; public class User { [JsonPropertyName("user_id")] public int UserId { get; set; } [JsonPropertyName("name")] public string Name { get; set; } }
Generated C# class with System.Text.Json attributes.
User Account DTO
Json: { "user_id": 10824, "username": "dotnet_architect", "is_active": true, "account_balance": 1540.75, "endpoints": [ "https://api.fnct.net/v1", "https://backup.fnct.net" ], "metadata": { "created_at": "2026-08-19T00:00:00Z", "ip_address": "192.168.1.1", "login_count": 42 } }, Root Name: UserAccountDto, Namespace: Fnct.Models, Serializer: system_text_json, Use Records: false
Accurate Operational Result
Provides instant quantitative evaluation for comparative practical analysis.

Frequently Asked Questions

Evidence-Based Methodology & Authoritative References

References & Methodology

Microsoft Learn - C# Programming Guide

View Reference

Microsoft Learn - System.Text.Json Overview

View Reference
Calculation Standard & Formulation

Standard: ISO / W3C / IETF Authoritative Domain Standard

Formula: C# Class = "public class " + ClassName + " n" + Fields.map(f ⇒ " [JsonPropertyName("" + f.jsonKey + "")]n public " + f.type + " " + f.name + " get; set; ").join("n") + "n"

Last Reviewed: August 21, 2026

Authoritative Sources & Peer Review

Primary Source: Microsoft Learn - C# Programming Guide

Reference Document: Microsoft Learn - System.Text.Json Overview

Computation Privacy: 100% client-side 0ms computation, zero data retention

Technical Standards & Execution Scope

All algorithms, formatters, and data conversions run 100% locally in your browser following official technical standards (RFC, ISO, W3C). Output should be verified prior to mission-critical production deployment.

TOPIC CLUSTER & KNOWLEDGE MESH

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Calculated results are modeled based on standard scientific and mathematical formulas. Please verify with domain-specific technical documentation for specialized applications.

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