transform.ignlab.net
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Paste a sample JSON payload — an API response, a config object — and get real TypeScript interface definitions back. Nested objects are broken out into their own named interfaces automatically, and arrays are typed from their first element.
Nested interfaces are named from the property key that contains them (e.g. a "user" field with an object becomes interface User), de-duplicated automatically if the same shape repeats.
For arrays with mixed element types it generates a union type, e.g. (string | number)[].
Yes, nesting is unwound recursively into separate interfaces at any depth.
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