Does it handle nested objects?

Yes. Nested objects generate nested interfaces, and arrays are typed correctly as T[].

What happens with null values?

Null values are typed as the detected type unioned with null (e.g. string | null).

Can I use this for API response types?

Yes. Paste the JSON response from any API and get TypeScript types ready to use in your frontend or backend code.

JSON to TypeScript

Convert a JSON object into TypeScript interface definitions, handling nested objects and arrays.

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About JSON to TypeScript

Convert a JSON object into TypeScript interface definitions, handling nested objects and arrays. Powered by JustUse.me — free, ad-free, and private. This tool runs entirely in your browser. Your files are never uploaded to any server.

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