Developer•Free tool

JSON to TypeScript – Generate TS Interfaces

Convert JSON to TypeScript interfaces automatically. Paste JSON and get ready-to-use type definitions for your project.

No sign-upBrowser-based
DEV

Tool

Enter your values and get results instantly.

HOW

How to Use

  1. 1Paste your JSON\n2. Choose the root interface name\n3. TypeScript interfaces are generated instantly\n4. Copy the code
WIN

Benefits

Automatic interface generation
Nested object and array types
Optional fields support
Copy with one click
Private — runs locally
FAQ

Frequently Asked Questions

How does JSON to TypeScript work?

Each JSON object becomes a TypeScript interface. Nested objects become nested interfaces, arrays become Array<T>, and primitives map to string, number or boolean.

Are optional fields supported?

Yes, you can enable the "optional fields" option so all properties are marked with ? for maximum flexibility.

Is my JSON uploaded anywhere?

No, conversion happens entirely in your browser.