JSON to TS interface

This is a free online tool designed for developers to instantly convert JSON data or JavaScript objects into TypeScript interfaces or type aliases. It saves your coding time by automatically generating well-structured, strongly-typed code directly in your browser, perfect for frontend development and API integration.

Yes! Unlike strict JSON parsers, our converter gracefully handles non-standard JSON and plain JavaScript objects. You can simply paste objects without quotes around keys, and it will still accurately generate the corresponding TypeScript definitions.

Absolutely. You can customize the root interface name, add specific prefixes to your interface names to match your project conventions, append the export keyword, and even make all generated fields optional using the question mark syntax.

Yes, we provide an option to switch between generating standard TypeScript interfaces and type aliases. By enabling the Use Type Alias feature, all your converted data structures will be formatted using the type keyword.

Your data is completely secure. The entire JSON to TypeScript conversion process happens locally within your web browser. We do not upload, store, or transmit any of your JSON data to external servers, ensuring absolute privacy for your sensitive API responses.