JSON to TypeScript

Free

Paste any JSON object or array to automatically generate strictly typed TypeScript interfaces. Great for working with API responses. The converter handles nested objects, infers array types, and runs completely client-side in your browser.

Have a Question?

Contact us if you are facing any issues or have suggestions to improve the tool.

How to Use JSON to TypeScript

  1. 1

    Paste your JSON payload into the input panel on the left.

  2. 2

    The generated TypeScript interfaces will appear instantly in the right panel.

  3. 3

    Adjust the root interface name using the text input above the code if desired.

  4. 4

    Click the "Export" toggle to prefix interfaces with the export keyword, then click "Copy" to copy the generated code.

Features

  • ✓ Instant real-time conversion
  • ✓ Nested interface generation
  • ✓ Export keyword toggle
  • ✓ Runs 100% in the browser

Frequently Asked Questions

Does it send my JSON to a server?

No. All parsing and conversion happens directly in your browser. Your data never leaves your device.

How does it handle mixed arrays?

If an array contains multiple types (e.g., strings and numbers), it infers a union type (e.g., (string | number)[]).