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Convert JSON to TypeScript Interfaces

Generate TypeScript interfaces from JSON data. Free online JSON to TypeScript converter with nested type support.

🔒 100% Client-side⚡ Instant🆓 Free forever

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About Convert JSON to TypeScript Interfaces
Generate TypeScript interfaces from JSON data. Free online JSON to TypeScript converter with nested type support. This tool is part of the ConvertTOON developer tools suite, providing 40+ free online utilities for developers.
All processing happens entirely in your browser — your data never leaves your device. No sign-up required, no data collection, completely free and private.
💡 Looking for more tools? Visit ConvertTOON.com for JSON to TOON conversion, batch processing, and 40+ developer tools.
How to Convert JSON to TypeScript
  1. Paste your JSON data in the input panel
  2. The TypeScript output is generated automatically
  3. Click “Copy” to copy the result to clipboard
  4. Or click “Convert” to manually trigger conversion
TypeScript interfaces provide compile-time type safety for JavaScript applications. Generating TypeScript types from JSON API responses ensures your code correctly handles the data structure, catching errors before runtime.
Frequently Asked Questions
Is my data secure?
Yes. All conversion happens 100% in your browser using JavaScript. No data is ever sent to a server.
Is there a file size limit?
The tool handles files up to several MB comfortably. For very large files, consider using our batch converter or API.
Can I use this programmatically?
Yes! We offer a free REST API at /api/convert/json-to-typescript and an NPM package for Node.js integration.
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