JSON to TypeScript
Generate TypeScript interfaces from JSON data automatically
How to Use JSON to TypeScript
Automatically generate TypeScript interfaces from JSON data. Saves time when working with API responses, configuration objects, and data models.
- 1
Paste your JSON
Paste a JSON object or array into the input editor.
- 2
Set root name
Optionally change the root interface name (default: Root).
- 3
View interfaces
TypeScript interfaces are generated automatically with proper nesting and types.
- 4
Copy and use
Click Copy and paste the interfaces into your TypeScript project.
Frequently Asked Questions
Does it handle nested objects?
Yes, nested objects are extracted into separate named interfaces and referenced properly.
How does it handle arrays?
Arrays are typed based on their content — string[], number[], or custom interface arrays.
Does it detect nullable types?
Yes, null values are represented as `unknown | null` to indicate optional or nullable fields.
Is this tool free?
Yes, completely free with no signup required. All generation happens in your browser.