JSON to TypeScript
Convert JSON objects to TypeScript interfaces and types online. Instant type generation.
How to Use JSON to TypeScript
- 1Paste a JSON object or array into the input editor.
- 2View the generated TypeScript interfaces in the output panel.
- 3Adjust options like root type name or interface vs type alias if available.
- 4Click "Copy" to copy the generated TypeScript types to your clipboard.
Frequently Asked Questions
Why generate TypeScript types from JSON?
Manually writing TypeScript interfaces for API responses or configuration objects is tedious and error-prone. Generating types from a JSON sample ensures your types match the actual data shape, improving type safety and reducing bugs.
Does it handle nested objects and arrays?
Yes. The generator recursively processes nested objects and arrays, creating separate named interfaces for each nested structure so the output is clean and reusable.
What about optional fields?
Fields present in the JSON sample are generated as required properties. If you need optional fields, you can manually add the "?" modifier to specific properties after generating the base types.
Is my data sent to a server?
No. All type generation is performed entirely in your browser. No data is sent to any server.