Generate TypeScript interfaces from a JSON sample, with nested types, arrays and optional fields. Runs in your browser.
How to use the JSON to TS
Paste a JSON object or array.
Optionally set the root interface name.
Copy the generated TypeScript interfaces.
Frequently asked questions
Each nested object becomes its own named interface, referenced from its parent, so the result is clean and reusable.
Arrays of objects are merged into one interface, and keys missing from some elements are marked optional. Arrays of mixed primitives become a union element type.
No. The types are generated entirely in your browser, so your data never leaves your device.
A JSON to TypeScript generator that infers interfaces from an example, handling nested objects, arrays of objects with optional keys, and union types.
It runs locally in your browser, so it is fast and your data stays private. It infers a shape from the sample rather than enforcing a schema.
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