Does it support nested objects and arrays?

Yes, nested objects become separate classes and arrays infer the singular element type.

Can I generate records instead of classes?

Yes, toggle the Use record option to emit C# records.

How are dates and GUIDs detected?

String values matching ISO dates or GUID patterns are typed as DateTime or Guid automatically.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

JSON to C# Class

Generate C# classes or records from JSON, with nullable reference types.

Support

Works Offline

Privacy First

No Login

No API

Root class name

Use record

Nullable reference types

JsonPropertyName attributes

List<T> instead of arrays

JSON

C# classes

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

public class Root
{
    [JsonPropertyName("id")]
    public int Id { get; set; }

    [JsonPropertyName("userName")]
    public string? UserName { get; set; }

    [JsonPropertyName("isActive")]
    public bool IsActive { get; set; }

    [JsonPropertyName("score")]
    public double Score { get; set; }

    [JsonPropertyName("tags")]
    public List<string>? Tags { get; set; }

    [JsonPropertyName("profile")]
    public Profile? Profile { get; set; }
}

public class Profile
{
    [JsonPropertyName("city")]
    public string? City { get; set; }

    [JsonPropertyName("zip")]
    public object? Zip { get; set; }
}

About the JSON to C# Class

Paste JSON and instantly get ready-to-compile C# class or record definitions. Nested objects become their own classes, arrays infer the singular type, and common value shapes are detected (DateTime, Guid, bool, int, double). Toggle record vs class, nullable reference types, JsonPropertyName attributes and List<T> vs array.

Popular uses

json to c#
c# class generator
csharp class from json
json to record
csharp code generator

Examples

User object

JSON{"id":42,"name":"Ada"}

Output

public class Root { public int Id { get; set; } public string Name { get; set; } }

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

Related tools

AAB (Android App Bundle) Analyzer

Dev Utilities

Open an .aab file and inspect its manifest, modules, ABIs, densities and size breakdown.

Android APK Analyzer & Explorer

Dev Utilities

Open an APK, decode its manifest and browse or download every file inside.

APK Certificate Inspector (SHA-1 / SHA-256)

Dev Utilities

Read an APK's signing certificate and get its SHA-1, SHA-256 and MD5 fingerprints.

Archive Extractor & File Explorer

Dev Utilities

Unzip ZIP, TAR, GZ, 7Z, RAR and more in your browser — browse folders, preview and download files.

Code Minifier & Beautifier

Dev Utilities

Minify or beautify JavaScript, CSS, HTML, JSON, XML, SQL, Java, Kotlin, C#, C/C++, Go, Swift, PHP, Python and YAML.

HTML to JSX Converter

Dev Utilities

Convert HTML markup into clean React/JSX component code.

Frequently asked questions

Version 1.0.0 · Updated 2026-08-25 · Runs entirely in your browser