JSON to C# Class & Record Converter

Instantly convert JSON payloads into strongly typed C# classes, records, or POCOs with customizable JSON attributes and modern C# idioms.

At a glance

JSON to C# Converter is a free browser tool that converts JSON to idiomatic C# classes, records, and POCOs online. It detects integers, longs, doubles, booleans, strings, ISO 8601 DateTime, and generic List<T> collections. It also seamlessly switches between [JsonPropertyName] and [JsonProperty] serialization attributes. All processing is local: nothing is uploaded, and no account is required.

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100% Client-Side In-Browser JSON to C# Converter

Generate strongly typed C# classes, records, and POCOs with System.Text.Json or Newtonsoft.Json attributes. Zero network transmissions, 100% private in browser memory.

Local & Private Instant Conversion
Attributes:
JSON Input 0 B
Ready
Auto-evaluates on keystroke
C# Models Class Mode 
// Paste JSON on the left to generate C# models...
0 types 0 properties 0 depth
C# 10+ / .NET 6+
NuGet Dependencies BCL Runtime 
# System.Text.Json is included in standard .NET 6+ runtime
Modern C# Classes & Records

Switch seamlessly between standard mutable class { get; set; } and modern immutable record { get; init; } structures.

Dual Serialization Attributes

Built-in support for [JsonPropertyName] (System.Text.Json) and [JsonProperty] (Newtonsoft.Json).

100% Client-Side Privacy

Execution happens entirely in local browser memory with zero network requests or database tracking.

Why Use This JSON to C# Converter?

Modern C# Classes & Records: Generates standard mutable classes with { get; set; } or modern immutable records with { get; init; }.
System.Text.Json & Newtonsoft.Json Support: Seamlessly switch between [JsonPropertyName] and [JsonProperty] serialization attributes.
Smart Type Inference: Detects integers, longs, doubles, booleans, strings, ISO 8601 DateTime, and generic List<T> collections.
Nested Model Decomposition: Recursively parses complex JSON structures into clean, distinct PascalCase C# class hierarchies.
C# Keyword & Verbatim Identifiers: Automatically escapes colliding property names following Microsoft C# language guidelines.
100% In-Browser Privacy: All parsing and C# model generation run strictly in local browser memory with zero network transmissions.

How to Use JSON to C# Converter

1

Paste Your JSON

Copy a JSON payload from an API response, database query, or file and paste it into the left editor.

2

Configure C# Options

Select between modern C# classes or immutable records, and choose System.Text.Json or Newtonsoft.Json attributes.

3

Copy C# Code

Click 'Copy' to copy the generated C# code or download as a .cs file.

Worked example: JSON to C# Converter

Executed entirely inside your local browser memory using modern Web APIs. The engine verifies input syntax, performs deterministic transformation, and exposes instant copy or download options.

Sample JSON Data Source 
sample_payload.json (Valid format conforming to JSON specification)
Resulting CSHARP Output Processed 
converted_result.csharp (100% client-side)

Technical Specifications & Engine Details

Technical specifications and engine details for JSON to C# Converter
Specification Details
Supported Formats JSON, TEXT → CSHARP, CS, TEXT
Execution Mode 100% Client-Side In-Browser (client)
Browser Requirements Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs.
Performance Constraints Client browser memory limit (typically 1–2 GB RAM); processing speed depends on local device CPU.
Maintained by Pragyan Pahadi

100% Client-Side Privacy Guarantee

All JSON parsing and C# code generation execute 100% locally in your browser memory. Your data never leaves your device.

Frequently Asked Questions

How does this tool convert JSON to C# classes?
It recursively parses your JSON object, infers primitive and nested types, converts field keys to idiomatic PascalCase properties, and decorates them with JSON attributes.
What is the difference between class and record output modes?
Class mode creates standard mutable C# classes with get and set accessors, while Record mode generates modern C# immutable records with init accessors.
Which JSON library attributes are supported?
The tool natively supports both modern System.Text.Json ([JsonPropertyName]) and classic Newtonsoft.Json ([JsonProperty]), as well as plain POCOs.
How does it handle nullable fields and lists in C#?
Null JSON values are mapped to nullable references like object?, and arrays are inferred as generic List<T> with modern collection initializers.

Methodology

Rankings and recommendations here are never paid for.

Last updated .

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