JSON to TypeScript
Generate TypeScript interfaces from JSON objects and arrays locally, including nested objects, optional fields, and null unions.
Questions
Does JSON to TypeScript run locally?
Yes. The JSON parser and interface generator run in your browser.
Does it support nested objects?
Yes. Nested objects are emitted as separate interfaces with names based on the root interface and property name.
Does it merge arrays with different fields?
Yes. Object arrays are merged into one interface, missing keys become optional, and null values are included in the union.
Does Utilumo upload my input?
No. This tool is designed for local browser processing and does not send your input to a server.
Do I need an account?
No. Utilumo tools are built to work without accounts or sign-in.