JSON to TypeScript

Convert JSON objects to TypeScript interfaces or type definitions.

JSON Input

TypeScript Output

Root Name

TypeScript

1export interface Root {
2  id: number;
3  name: string;
4  email: string;
5  isActive: boolean;
6  roles: string[];
7  profile: RootProfile;
8}
9 
10export interface RootProfile {
11  avatar: string;
12  bio: string;
13}

Frequently Asked Questions

Yes, completely free with no sign-up required. Convert unlimited JSON to TypeScript types for your projects.

No, all conversion happens in your browser. Your JSON data never leaves your device, ensuring complete privacy.

Paste your JSON data from API responses, config files, or any source into the input field. Choose whether you want TypeScript interfaces or type aliases. Decide if properties should be optional or required. Review the generated TypeScript code - nested objects become separate interfaces and array types are properly inferred. Finally, copy the code and paste it into your project's types file.

Yes! Simply paste the JSON response from your API and get properly typed TypeScript interfaces for your codebase.

Use interfaces for object shapes that might be extended. Use types for unions, primitives, or when you need advanced type features.

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