JSON to C Sharp POJO Generator

Generate strongly typed C# POCO (Plain Old CLR Object) classes from any JSON payload without leaving your browser. The generator walks the parsed JSON tree, infers primitive types (bool, long, double, string), and emits one class per nested object with [JsonProperty] attributes so deserialisation with Newtonsoft.Json preserves the original property names.

Why infer C# models from JSON?

• REST API consumers: Drop sample responses to scaffold the DTOs your HttpClient will deserialise.
• Migration spikes: Translate sample documents from Mongo, DynamoDB, or vendor exports into POCOs as a starting point.
• Teaching: Show students how JSON shapes map to PascalCase C# properties.
• Code review aid: Compare hand-written models against an automated baseline.

How types are inferred

• JSON booleans become bool.
• JSON numbers map to long when they are integers and double otherwise.
• JSON strings map to string.
• Arrays become List<T> where T is inferred from the first non-null element. Empty arrays default to List<object>.
• Nested objects become their own classes named after the parent path in PascalCase. Duplicate class names get a numeric suffix to avoid collisions.

If you start with a JSON array at the root level the generator wraps it in a synthetic Items property so the resulting model is still a class you can deserialise directly.