JSON to TypeScript Converter

Convert JSON objects to TypeScript interfaces and types instantly

Files never leave your deviceNo signup required

Type Name

Output

JSON Input

TypeScript Output

// TypeScript types will appear here

Frequently Asked Questions

How does JSON to TypeScript conversion work?▼

The converter analyzes your JSON structure and generates corresponding TypeScript interfaces or type aliases. It detects string, number, boolean, null types and handles nested objects and arrays automatically.

Does it handle nested objects?▼

Yes. Nested objects are converted to inline type definitions. Arrays of objects are analyzed to find the common shape across all items.

Can I choose between interface and type?▼

Yes. Toggle between 'interface' and 'type' output modes. Interfaces are better for extensibility (can be extended/implemented), while types are more flexible for unions and intersections.

How to Use JSON to TypeScript Converter

1Open the JSON to TypeScript Converter tool above - it loads instantly in your browser.
2Enter your data or upload your file. Everything is processed locally on your device - nothing is uploaded to any server.
3Get your results instantly. Copy, download, or share - completely free with no signup required.

JSON to TypeScript Converteris part of BriskTool's collection of free online tools. All tools run entirely in your browser for maximum privacy and speed.