RichScriptsAll tools ↗Generate C# classes or TypeScript interfaces from JSON, including nested objects and arrays.
Turn sample JSON into typed models. Nested objects, arrays, and nullable fields included.
Paste JSON or load the example to begin.
Your JSON stays in this browser. No upload, account, or API key required. Maximum input: 1 MB.
A single object or an array of objects, straight from an API response.
C# classes or TypeScript interfaces, with a root type name of your choosing.
Nested objects become their own types, and arrays become typed collections.
A field is typed from the values present. A number that is always whole looks like an int, so check fields that could be decimal.
Nulls and fields missing from some objects are marked nullable or optional rather than being dropped.
Keys that are not valid identifiers are adjusted, so review the property names before committing.
The JSON stays in your browser, which matters for real payloads.
Yes. Nested objects become separate types and arrays become lists of the element type.
They are generated as nullable or optional, so deserialisation does not fail when they are absent.
They reflect the sample you paste. Provide a representative example, and double-check numeric fields that may be decimal in production.
No. The models are generated in your browser.
Objects become named types. Array entries are combined to discover all fields. Missing TypeScript properties become optional; nullable C# properties preserve nulls. Original JSON keys are retained with JsonPropertyName attributes.
Types are inferred from your examples, not a complete schema. Dates remain strings. Review empty arrays, null-only fields, mixed types, and large numbers. C# output uses nullable annotations and System.Text.Json (C# 8 or later).