JSON to TypeScript

Convert JSON to TypeScript interfaces and Zod schemas online for free. 100% private, instant, browser-based generator for frontend & backend developers.

How to Use JSON to TypeScript

  1. Paste your JSON payload into the input editor.
  2. Optionally change the Root Type Name (e.g. User, Product, Response).
  3. Toggle between TypeScript Interface and Zod Schema generation.
  4. Click Copy Code to copy the formatted TypeScript or Zod code directly to your clipboard.

Why Choose Krynn Tools for JSON to TypeScript?

  • Dual Mode: Convert JSON to standard TypeScript Interfaces or full Zod schemas with single-click toggle.
  • Nested Support: Automatically recurses into nested objects and arrays to create clean, modular interfaces.
  • 100% Private: Processing occurs entirely inside your web browser. No API calls or server data collection.

Frequently Asked Questions

Does this tool handle nested JSON objects?

Yes! It automatically extracts sub-objects into separate PascalCase interfaces or sub-schemas.

Can I generate Zod validation schemas?

Yes, click the Zod Schema tab to generate z.object() declarations with automatic infer types.