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Silixen

JSON to TypeScript Converter — Generate Interfaces

Accelerate frontend and backend TypeScript development by converting raw JSON payloads into clean, strongly typed TypeScript interfaces and type aliases. Handles deeply nested objects, optional field detection, and union types with instant one-click clipboard copying. Copy strongly-typed interface definitions directly into your frontend components or backend controllers for immediate compilation and auto-completion.

100% Client-Side PrivacyZero Installation

JSON to TypeScript Converter

Paste your JSON response from an API and instantly generate robust TypeScript interfaces.

Input: JSON

Output: TypeScript Interfaces

Why convert JSON to TypeScript?

When working with REST APIs, you often receive raw JSON data. By converting this JSON into strict TypeScript interfaces, you gain the benefits of strong typing, autocomplete, and compile-time error checking in your IDE. This tool uses the json-to-ts library to recursively analyze your JSON and output perfectly formatted Typescript types.

How to Use

  1. 1Paste your sample JSON data or API payload.
  2. 2Set your root interface name (e.g. RootObject or UserResponse).
  3. 3Copy the generated TypeScript type declarations.

Common Use Cases

  • ✓

    Typing API response payloads in Next.js, React, and Node.js applications.

  • ✓

    Creating strict TypeScript models from third-party webhook payloads.

  • ✓

    Documenting backend data schemas in full-stack codebases.

Got Questions?

Frequently Asked Questions

Does this handle nested JSON objects?
Yes, it recursively generates sub-interfaces for all nested objects.
Are optional properties supported?
Yes, missing or null attributes are typed cleanly as optional or union types.
Is the conversion private?
Yes, the type generator executes strictly client-side.

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