JSON to TypeScript Converter
Generate TypeScript interfaces or Zod schemas from any JSON instantly. Handles nested objects, arrays and optional fields. Runs in your browser.
- No uploads
- No limits
- No signup
- Input:
- JSON
- Output:
- Text
- Runs on:
- Your device
- Size limit:
- None
- Account:
- Not needed
How to use JSON to TypeScript Converter
Paste your JSON
Paste a sample API response or any JSON. A sample is already filled in.
Pick the output
Choose TypeScript interfaces, type aliases or a Zod schema, set the root name and the export keyword.
Copy the types
Copy the generated code or download it as a .ts file.
Why JSON to TypeScript Converter on Toolshed
No uploads
Everything runs in this browser tab. Your files never leave your device.
No limits
No file-size caps, no daily quotas. Process as much as your device can handle.
No signup
No account, no email, no watermark.
Frequently asked questions
How are optional fields detected?
When an object appears several times in an array, keys missing from some items become optional (name?: string). Differing value types become a union.
Can it generate Zod schemas?
Yes. Choose Zod schema to get z.object definitions and an inferred type, ready to paste into your project.
Is my JSON uploaded?
No. The types are generated in your browser, so API responses and data never leave your device.
Are my files uploaded anywhere?
No. JSON to TypeScript Converter runs entirely in your browser. Your files are processed on your device and are never sent to a server.
Is there a file size limit?
No fixed limit. The only limit is your device's memory. Very large files work best in a desktop browser.
Is JSON to TypeScript Converter really free?
Yes. There's no account and no watermark. A short optional ad, or a 20-second wait, unlocks each download. That's how we keep it free.