Should I use System.Text.Json or Newtonsoft.Json?

For modern .NET Core, .NET 6, 7, 8, and 9, System.Text.Json is built into the runtime and is significantly faster with lower memory allocations. If your existing solution relies on Json.NET (Newtonsoft), you can switch serialization libraries with one click in the options panel.

JSON to C# Converter

Convert JSON payloads into C# records or classes with System.Text.Json / Newtonsoft attributes, nullable reference types, and clean namespaces.

Target:

Load Template:

JSON Input21 lines · 507 chars

C# (.NET).cs

Generated C# (.NET) code will appear here

Paste or type valid JSON on the left to see instant, production-ready models.

Ready to compile · Deterministic output.cs

100% Client-Side Privacy: Your JSON is parsed and compiled entirely in your browser using local Web APIs. Nothing is sent to any server.

Zero Network Transfer

What is the JSON to C# Converter?

The PriyGop JSON to C# Converter generates clean, production-grade .NET models from JSON payloads. You can choose between modern C# 9+ positional records or standard classes with auto-properties, complete with System.Text.Json orNewtonsoft.Json serialization attributes.

C# Generation Features

C# Records: Concise immutable DTOs with primary constructors and [property: JsonPropertyName].
Nullable Reference Types: Generates string? and long? to prevent NullReferenceException.
System.Text.Json / Newtonsoft: Toggle between modern .NET built-in serialization or legacy Json.NET.
File-Scoped Namespaces: Emits clean, modern C# 10+ namespace declarations.

Our Tool Features

Why developers and engineers prefer this tool for everyday development workflows.

Cross-Device Compatibility

Works seamlessly on all modern desktop, tablet, and mobile browsers including Chrome, Firefox, Safari, Edge on Windows, macOS, Linux, Android, and iOS.

Fast In-Browser Execution

Processes your data in real-time directly inside your browser. No queue wait times, no network round-trips, and zero latency.

100% Client-Side Privacy

Your code, tokens, passwords, and files are never transmitted to any external server or saved in logs. Everything runs locally in memory.

Instant File & Clipboard Input

Supports one-click sample loading, file drag-and-drop, and pasting directly from your clipboard (Ctrl + V) for effortless workflows.

Strict Standards Compliant

Built strictly according to official specifications (RFCs, W3C, ISO, and standard cryptographic algorithms) ensuring accurate output every time.

Unlimited Free Usage

No registration, no accounts, no subscriptions, and no hidden daily quotas. Use this tool as many times as you need without restrictions.

Recent Updates & Improvements

Continuously maintained and improved based on developer feedback.

Client-Side Speed & Performance UpgradeRecent Update

Optimized processing algorithms with Web Workers and native browser APIs (SubtleCrypto, Canvas 2D) for instantaneous zero-latency execution.

Clipboard Paste & Drag-and-Drop AddedFeature Added

Added instant clipboard pasting (Ctrl + V) and drag-and-drop file support to accelerate developer productivity without manual downloads.

Enhanced Mobile & Touch Device ExperienceUI/UX Update

Redesigned responsive touch controls, flexible copy buttons, and camera preview framing for mobile and tablet browsers.

How To Use JSON to C# Converter Online?

Follow these quick steps to get instant, accurate results in seconds.

Input JSON Data

Paste your API response or JSON document.

Paste any valid JSON payload into the editor.
Click 'Sample' to quickly test a multi-field user structure.

JSON PayloadClient-Side

{
  "order_id": 991,
  "amount": 149.50,
  "shipped": true
}

Instant ExecutionReady

Configure .NET Options

Choose between Records or Classes, set JSON serializer.

Select 'Record' for modern C# 9+ or 'Class' for classic auto-properties.
Choose System.Text.Json (modern .NET) or Newtonsoft.Json.
Customize the target namespace.

C# OutputClient-Side

public record Order(
    [property: JsonPropertyName("order_id")] long OrderId
);

Instant ExecutionReady

Download C# File (.cs)

Copy or save the .cs file for your ASP.NET Core solution.

Click 'Copy Code' or 'Download' to save the .cs file.

Deserializing in C#Client-Side

var order = JsonSerializer.Deserialize<Order>(json);

Instant ExecutionReady

Supported Formats & Syntax Examples

Common input data types and real-world representations supported by this tool.

Modern C# Record with System.Text.Json

Record

Immutable record declaration with property attributes.

Example Syntax

namespace Models;

using System.Text.Json.Serialization;
using System.Collections.Generic;

public record User(
    [property: JsonPropertyName("id")] long Id,
    [property: JsonPropertyName("user_name")] string UserName,
    [property: JsonPropertyName("skills")] List<string> Skills
);

Fully compatible with ASP.NET Core Minimal APIs and controllers.

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namespace Models; using System.Text.Json.Serialization; using System.Collections.Generic; public record User( [property: JsonPropertyName("id")] long Id, [property: JsonPropertyName("user_name")] string UserName, [property: JsonPropertyName("skills")] List<string> Skills );