Enter your TypeScript type definition below and get mock data generated instantly.
TypeScript type mocking is the process of generating realistic sample data that conforms to TypeScript type definitions. It's useful for development, testing, and documentation purposes, allowing developers to visualize how data structures will look at runtime.
Mock data generation is essential for frontend development without a ready backend, testing UI components with various data shapes, creating API documentation examples, and setting up realistic test scenarios for unit and integration tests.
Our TypeScript mock generator supports primitive types (string, number, boolean), arrays, objects, interfaces, type aliases, union types, and complex nested structures. It also handles special types like Date, null, and optional properties with the "?" modifier.
You can customize mock data by using more specific type declarations or JSDoc comments. For example, you can use string literal types, numeric ranges, or specialized types like "email" or "date" to get more realistic and domain-specific mock values.
Yes! This tool works with any valid TypeScript type definitions. Simply copy your interfaces or types from your existing TypeScript projects and paste them into the generator. The tool will analyze your type structure and generate appropriate mock data.
TypeScript mock data provides consistent test fixtures that match your actual data models. This ensures your tests are reliable and closely simulate real application data. It also makes it easier to test edge cases by quickly generating variations of your data structures.
For advanced use cases, you can create complex nested types that combine interfaces, unions, and generics. The mock generator will recursively create appropriate mock values for each level of your type hierarchy.