JSON TO TYPESCRIPT
JSON to TypeScript Interface
Generate TypeScript interfaces from JSON. Optional properties, readonly, and export support.
Generate TypeScript interfaces from JSON. Optional properties, readonly, and export support.
TypeScript adds static typing to JavaScript, making large codebases more maintainable. When working with JSON APIs, defining TypeScript interfaces ensures type safety and provides great IDE autocomplete. This tool generates TypeScript interfaces from JSON data, speeding up your development workflow.
Defining API response types for frontend applications. Creating Props types for React or Vue components. Migrating JavaScript projects to TypeScript. Documenting data structures in your codebase.
Paste your JSON data into the input field. Set options like interface name, export keyword, and readonly mode. Click Convert to generate TypeScript code. The tool automatically infers types from your JSON data - strings, numbers, booleans, arrays, and nested objects. Copy the result directly into your .ts files.
For object shapes, interface is generally preferred in TypeScript - it supports declaration merging and extends better. Type aliases are more flexible for union types, tuples, and mapped types. For simple data structures from JSON, either works fine.
The ? marks a property as optional, meaning it might not exist on the object. This is useful for API responses where some fields may be missing. The tool marks fields as optional based on null values or inconsistent presence in arrays.
Absolutely! Generated interfaces work great for React component props. Just rename the interface to match your component name and use it in your function signature.
Readonly properties can only be assigned once, when the object is created. This enforces immutability and is useful for configuration objects, state objects, or any data that shouldn't be modified after creation.