JSON to Java Record Converter

How type generation works

The generator parses your JSON into a value tree, then builds an intermediate schema. Each object becomes a named interface derived from its key, so profile yields a Profile type. Arrays are reduced to a single element type by merging every element: an array of objects merges key by key, and any key missing from one row is marked optional. Mixed primitive arrays become a union. null values make a field optional or nullable, and integers are separated from floating-point numbers so languages like Go, Rust, and Python receive exact integer or float types. All definitions are emitted in valid compilation order.

Frequently Asked Questions