JSON to TypeScript

Paste JSON and get TypeScript interfaces instantly. Handles nested objects, arrays, and union types. All processing happens in your browser.

Root interface name

export keyword

Optional properties (?) Readonly properties

JSON input

TypeScript output

How it works

Paste any JSON object or array. The converter parses the structure and detects all data types.

TypeScript interfaces are generated with proper types, nested interfaces, and array generics.

Copy the TypeScript code to your clipboard or download it as a .d.ts file.

Format, validate, and minify JSON data.

Convert between CSV and JSON formats instantly.

Convert between YAML and JSON formats instantly.

We're building more free utilities for web artisans. Get in touch with suggestions.