Free JSON to TypeScript Interface Generator
Paste any JSON data and generate TypeScript interfaces automatically. Handles nested objects, arrays, strings, numbers, booleans, null, and optional fields. All processing happens locally in your browser.
How to Use
- Paste JSON data into the input area
- Click Generate Interface
- Toggle Optional Fields to make all fields optional
- Copy the generated TypeScript
Privacy
All processing happens locally. No data is transmitted.
Last reviewed: July 2026.