Stop Typing Interfaces: Convert JSON to TypeScript Instantly

Manually typing out TypeScript interfaces based on complex JSON API responses is tedious and prone to typos. Streamline your development workflow by automatically generating robust TypeScript interfaces with our JSON to TS tool.

What is the JSON to TS Tool?

The JSON to TS tool is a developer utility that parses a raw JSON object or array and automatically infers the data types, generating the corresponding TypeScript interface or type definitions. It handles nested objects, arrays, and optional properties, saving developers significant time when integrating external APIs.

Step-by-Step Guide: How to Use It

1. Paste JSON: Paste your valid JSON payload into the left-hand input editor.
2. Configure (Optional): Specify a custom root interface name, or toggle settings like generating type aliases instead of interfaces.
3. Generate: The tool will instantly parse the JSON.
4. Copy TypeScript: Grab the generated, strictly-typed TypeScript code from the right-hand panel and paste it into your project.

Practical Use Cases

• API Integration: Paste the response payload from a third-party REST API to immediately get the types needed to handle the data safely in your app.
• State Management: Generate types for your Redux or Vuex stores based on initial state JSON objects.
• Refactoring: Quickly convert large config files or mock data files from plain JSON into typed TypeScript modules.

FAQ

How does it handle nested objects? The tool will automatically create separate, uniquely named interfaces for nested objects and reference them within the root interface.

What happens if an array contains different data types? The tool will infer a union type (e.g., (string | number)[]) to accommodate all variations found within the array.