Paste any JSON and get ready-to-use Swift structs that conform to Codable. Types are inferred recursively: nested objects become their own named structs (from the field name), arrays get a Swift array type inferred from their first non-null item, and null values produce optional types marked with a trailing question mark. The root struct name is configurable and defaults to Root.
This is handy for turning an API response into typed models you can decode with JSONDecoder in seconds. The whole tool is plain JavaScript running locally in your browser — no build step, no server, no upload — so it is safe for private or proprietary payloads.