Convert JSON to TypeScript interfaces instantly. Generate types from JSON data with full support for nested objects and arrays.
TypeScript provides static typing for JavaScript. When working with external data like API responses, you need to define the shape of that data. This tool automatically generates TypeScript interfaces from any JSON, saving you time and preventing type errors.
Type safety is crucial for maintainable codebases. By generating types from actual data, you ensure your types match the real structure of your data.
API Development
Quickly create TypeScript types from API response JSON
Data Modeling
Generate type definitions from JSON data structures
Migration
Convert existing JSON configs to TypeScript safely
Rapid Prototyping
Speed up development by auto-generating types
How do I convert JSON to TypeScript?
Paste your JSON data into the input field. The tool will automatically generate TypeScript interfaces. You can customize the interface name and choose between optional or required properties.
What types are supported?
The tool detects string, number, boolean, null, arrays, and objects. For arrays, it infers the type from the first element. Nested objects become nested interfaces.
Can I generate optional properties?
Yes! Toggle the 'Optional Properties' switch to generate interfaces with optional properties (using the ? operator). This is useful when working with API responses that may have missing fields.
Should I use type or interface?
Both work for most cases. Use 'interface' for object types that may be extended. Use 'type' for unions, intersections, or when you prefer a more functional style. The tool supports both.
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