Paste any JSON and get clean TypeScript interfaces instantly. Handles nested objects, arrays, nullables, and more.

How it works

Paste any JSON object or array and the converter will:

• Generate named TypeScript interfaces for each nested object
• Detect string, number, boolean, arrays, and nested types
• Mark null values as optional with union types
• Handle arrays of objects by creating separate interfaces

When to use this

• Consuming a REST API and need types fast
• Converting API responses to TypeScript models
• Prototyping with real data before writing schemas by hand

Everything runs in your browser — your JSON never leaves your machine.