TypeScript Interface Generator
Convert sample JSON payloads into clean, nested TypeScript interface declarations. Streamline frontend and backend typing configurations.
How Static Types Improve App Maintainability
TypeScript adds static types to JavaScript, helping developers catch syntax and runtime errors during compilation. However, writing types manually for complex API responses, database models, or config files is tedious and error-prone.
Our online interface generator converts sample JSON outputs into type-safe declarations automatically, making it easy to build type-safe network layers in minutes.
Frequently Asked Questions
Does this tool generate nested interface declarations?
Yes. For nested objects or array items, the generator recursively builds separate interface structures, linking them as property types in the parent interface.
How are optional properties handled?
The generator creates strict interfaces by default. You can manually adjust the output code to make properties optional by adding a '?' suffix to key names.
Is my JSON payload kept secure?
Yes. The parsing and interface generation logic runs entirely on your device. None of your source data is sent to external networks or servers.