JSON to TypeScript

Generate clean, nested TS interfaces locally and securely.

Input JSON:

Generated TypeScript Interfaces:

💻 How to Generate TypeScript Interfaces

Paste your JSON: Input your sample JSON data (like an API response) into the editor.
Automatic Inference: The tool analyzes the data structure, identifying strings, numbers, booleans, and nested objects.
Copy Interfaces: Click the Copy button to grab the production-ready TypeScript code.
Integrate: Paste the interfaces into your .ts or .d.ts files for instant type safety.

🔒 Private & Local-Only Development

Most online generators send your JSON code to a remote server for processing. This is a security risk for developers working with proprietary APIs. The Manic Inventor JSON to TypeScript Tool keeps your data safe:

100% Client-Side: All type inference logic is executed in your browser. Your JSON never leaves your machine.
No Logging: We don't track the structure of your data or store your code snippets.
High Performance: Local execution means your interfaces are generated instantly, regardless of your internet speed.

Pro-Tip: Use our JSON Formatter first to ensure your JSON is valid before generating your types.