JSON code generation / C#

Free online JSON to C# record generator

Generate models for an order with line items and a nullable delivery window. Open your JSON locally, then inspect and download the generated files.

Privacy-first processing: pasted or opened JSON stays in this browser tab and is not uploaded to our servers.

Target: C#Choose serializer and model options in the workbench

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Try the order receipt example

The editor starts empty. Load this example only if you want a small source to test the generated model.

Static example with expected output

Verified with the local schema-codegen engine.

Order JSON

{
  "orderId": "ORD-418",
  "deliveryWindow": null,
  "lines": [
    {
      "sku": "PAD-7",
      "quantity": 2,
      "unitPrice": 19.5
    }
  ]
}

Operation

Generate C# records from this sample shape.

Language: C#
Serializer: none
Style: record
File layout: split files

Expected output excerpt (GeneratedRoot.cs)

public record GeneratedRoot
{
    public object? DeliveryWindow { get; init; }
    public List<GeneratedRootLinesItem> Lines { get; init; }
    public string OrderId { get; init; }
}

Caveat: The nullable delivery window is inferred as object? because the sample only contains null.

Before using this output

Review nullable fields and numeric precision. Generated records describe this sample, not all valid orders or application validation.

Generation analyzes the source shape; it does not validate every future input. Review the language, serializer, enum, primitive, and file-layout options before downloading.

Read the C# workflow

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