About JSON2TypeScript
A free, privacy-first JSON to TypeScript converter that runs entirely in your browser.
Why JSON2TypeScript Exists
Working with JSON data in TypeScript projects often means manually writing interfaces or types to match your data structures. This is repetitive, error-prone, and slows you down. JSON2TypeScript was built to eliminate that friction — paste your JSON, and instantly get production-ready TypeScript code.
What It Does
JSON2TypeScript takes any valid JSON input and converts it into TypeScript. You can choose between multiple output formats: TypeScript interfaces, type aliases, Zod schemas, or Yup schemas. The tool infers types automatically — strings, numbers, booleans, arrays, nested objects, and null values — so you get accurate, ready-to-use code every time.
Key Features
- Multiple Output Formats — Generate interfaces, type aliases, Zod schemas, or Yup schemas with one click.
- Real-Time Conversion — See TypeScript output as you type or paste JSON.
- Dark Mode — Toggle between light and dark themes for comfortable use in any environment.
- Drag & Drop — Drop a JSON file directly onto the editor for instant conversion.
- Copy to Clipboard — One-click copy so you can paste directly into your project.
- Custom Naming — Set your own interface or type names instead of the default "Root".
Privacy by Design
Every conversion happens locally in your browser. No data is ever sent to a server. There are no tracking cookies. Your JSON stays on your machine, always.
Who It's For
JSON2TypeScript is built for developers, students, and anyone working with JSON and TypeScript. Whether you're prototyping an API response type or converting a large JSON payload, the tool saves you time and eliminates manual typing errors.