JSON to TypeScript, Java & Go types
Paste a JSON object or array and generate a TypeScript interface, a Java class, or a Go struct in one click — nested objects and arrays are broken out into their own named types automatically. A single tool that covers all three languages, something most free JSON editors don't offer.
// Click "Generate" to see output here.
One JSON input, three type systems
Stop hand-writing interfaces every time an API response changes. Generate matching types for your frontend, backend, or Go service from the same JSON sample.
Frequently asked questions
Does this tool generate TypeScript, Java, and Go?
Yes — one tool, three output languages. Switch tabs to generate a TypeScript interface, a Java class with getters/setters, or a Go struct with json tags, all from the same JSON input.
How are nested objects and arrays handled?
Nested objects become their own named type (interface, class, or struct), and arrays are typed based on their first element, so deeply nested JSON produces a full set of related types.
Can I rename the root type?
Yes, set the root type/class name field before generating. Nested type names are derived automatically from their property names.
Is my JSON uploaded anywhere?
No. Parsing and code generation both happen in your browser with JavaScript. Nothing is sent to a server.