JSON to TypeScript
Generate TypeScript interfaces or type aliases from JSON data. Nested objects are automatically converted to separate types.
Input
Output
Result appears here
About Type Generation
- Nested objects are converted to separate interfaces/types
- Arrays are typed based on their first element
- Use "interface" for extendable types, "type" for unions/intersections
- Optional (?) properties work well when some fields may be undefined
TypeScript Types - Technical Details
TypeScript interfaces define the shape of objects for compile-time type checking. Generating types from JSON is useful when working with API responses, configuration files, or any structured data.
Command-line Alternative
# Generate types with quicktype CLI\nnpx quicktype --lang ts --src data.json\n\n# Or use json-to-ts npm package\nnpx json-to-ts data.json