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JSON to TypeScript
Runs in your browserInput
Output
Ready — zero server calls
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How to Use
- Paste a JSON object or array into the input field.
- Click Convert to generate TypeScript interfaces.
- Copy the generated interfaces into your TypeScript project.
Convert JSON to TypeScript
Paste any JSON and get TypeScript interfaces instantly. The converter infers types from values, handles nested objects, arrays of objects, optional fields, and date strings. Perfect for quickly creating type definitions from API responses.
How It Works
The tool analyzes your JSON structure, creates named interfaces for each object type, singularizes array names for child interfaces, and detects common patterns like ISO dates. Nested objects become separate interfaces, and arrays of objects are merged to capture all possible fields.