Generate TypeScript interfaces and types from JSON data automatically. Save time writing type definitions.
Want to jump straight in? Use our free JSON to TypeScript tool directly.
Navigate to the JSON to TypeScript converter on UtilsNow. Works instantly in your browser.
Paste a sample JSON response (e.g. from an API) into the input area. This provides the structure for type generation.
Choose between interfaces or type aliases, set the root type name, and configure optional properties if needed.
The tool analyzes your JSON structure and generates accurate TypeScript interfaces with proper types for all fields, including nested objects and arrays.
Copy the generated TypeScript code and paste it into your project source file.
Use our free JSON to TypeScript tool — no signup, no uploads, works directly in your browser.
Open JSON to TypeScriptYes, the tool recursively generates separate interfaces for nested objects, creating clean and reusable type definitions.
Yes, just paste a sample API response and the tool will generate complete TypeScript types matching the response structure.
Yes, arrays are typed correctly (e.g., string[], number[]) and you can configure fields as optional with the ? modifier.