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JSON to C#

Convert JSON objects into C# classes with properties, nested models, collection types, nullable options, and JSON property-name attributes.

Runs locally in your browser
JSON Input
C# Output
using System.Collections.Generic;
using System.Text.Json.Serialization;
#nullable enable

// Generated from JSON.
// Review inferred types before using these models.

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

    [JsonPropertyName("timezone")]
    public object? Timezone { get; set; }
}

public class ProjectsItem
{
    [JsonPropertyName("name")]
    public string? Name { get; set; }

    [JsonPropertyName("stars")]
    public int Stars { get; set; }

    [JsonPropertyName("active")]
    public bool? Active { get; set; }
}

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

    [JsonPropertyName("name")]
    public string? Name { get; set; }

    [JsonPropertyName("email")]
    public string? Email { get; set; }

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

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

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

    [JsonPropertyName("projects")]
    public List<ProjectsItem>? Projects { get; set; }
}

Generation notes

  • • Nested objects become separate C# classes.
  • • Object arrays merge fields from all objects.
  • • Missing properties are treated as optional.
  • • Nullable value types can represent JSON null values.
  • • JsonPropertyName preserves original JSON property names.
  • • Review mixed-type arrays before using the generated model.

How to use JSON to C#

  1. 1Paste a valid JSON object or array.
  2. 2Set the root class name and nullable options.
  3. 3Copy or download your generated C# classes.