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JSON / XML → C# Converter

Convert JSON to C# classes, XML to C# classes, or generate object initializers — instantly, in your browser.

C# output
public class Root
{
    public int Id { get; set; }
    public string Name { get; set; }
    public bool IsFree { get; set; }
    public List<string> Tags { get; set; }
    public Owner Owner { get; set; }
}

public class Owner
{
    public string Email { get; set; }
    public bool Verified { get; set; }
}

How to use the converter

  1. Paste your JSON or XML into the input box above — a single API response or sample payload is enough.
  2. Choose the output you need: strongly-typed C# classes or a ready-to-use object initializer.
  3. Copy the generated code straight into your project. Types, nested classes, and collections are all worked out for you.

What you can generate

  • JSON → C# classes — Turn any JSON object into matching C# model classes with inferred property types. Perfect for deserialising API responses with System.Text.Json or Newtonsoft.Json.
  • XML → C# classes — Generate C# classes from an XML document for older SOAP services and XML config files.
  • Object initializers — Produce object-initializer code from a JSON sample, ideal for test fixtures and seed data.

Common use cases

Hand-writing C# models for a large API response is slow and error-prone — one mistyped property and deserialisation silently breaks. Developers reach for this converter when they want to:

  • Scaffold DTOs for a third-party REST API in seconds instead of typing them by hand.
  • Keep models in sync after an API adds or renames fields.
  • Generate quick test data and fixtures from a real JSON payload.
  • Migrate XML-based integrations to typed C# objects.

Because everything runs locally in your browser, you can safely paste internal or confidential payloads — nothing is uploaded.

Frequently asked questions

How do I convert JSON to C# classes?⌄

Paste your JSON into the input box above and the tool instantly generates matching C# classes — including nested objects and arrays as separate strongly-typed classes. Copy the result straight into your project. No sign-up and no upload required.

Does the converter handle nested objects and arrays?⌄

Yes. Nested JSON objects become their own C# classes, and JSON arrays are mapped to List<T> with the correct element type. Property types (int, double, bool, string, DateTime) are inferred automatically from the sample values you paste.

Can it convert XML to C# as well?⌄

Yes. As well as JSON, you can paste XML and generate the equivalent C# classes, which is useful when you're working with legacy SOAP APIs or config files that still use XML.

What is a C# object initializer and when would I use one?⌄

An object initializer is C# syntax that creates and populates an object in a single expression, e.g. new Person { Name = "Sam", Age = 30 }. This tool can turn a JSON sample directly into initializer code, which is handy for seeding test data or writing unit-test fixtures quickly.

Is my data sent anywhere?⌄

No. The conversion runs entirely in your browser — your JSON or XML never leaves your device and is never uploaded to a server. That makes it safe to use with internal API responses or confidential payloads.

Is it free to use?⌄

Completely free, with no account, no usage limits, and no watermarks on the generated code.