JSON → TypeScript
Convert JSON data into TypeScript interfaces or type definitions.
JSON Input
TypeScript Output
About JSON → TypeScript
JSON to TypeScript converts JSON objects into TypeScript interfaces or type definitions that can be used in TypeScript projects.
How to use JSON → TypeScript
- Paste your JSON object into the input area.
- Enter a name for the root TypeScript type.
- Choose interface or type as the output format.
- Click Convert.
- Review and copy the generated TypeScript code.
What is JSON to TypeScript?
JSON to TypeScript is a converter that analyzes the structure of a JSON object and generates TypeScript type definitions from it. This can save time when creating types for API responses, configuration objects and other structured data.
Interface vs Type
| interface | type |
|---|---|
| Commonly used for object shapes and supports declaration merging. | More flexible and can represent unions, intersections and other type expressions. |
How are JSON values converted?
| JSON value | TypeScript type |
|---|---|
| String | string |
| Number | number |
| Boolean | boolean |
| Null | null |
| Object | Generated interface or type |
| Array | Type[] |
Nested JSON objects
Nested JSON objects are converted into separate TypeScript interfaces or type definitions. Arrays containing objects are also converted into arrays of the generated object type.
When should you use JSON to TypeScript?
This tool is useful when working with API responses, JSON configuration files, mock data or external data structures that need TypeScript type definitions.
Is my JSON uploaded to a server?
No. The conversion is performed directly in your browser using JavaScript. Your JSON data does not need to be uploaded to a server.