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No matching tools
JSON to TypeScript
Infer TypeScript types from JSON
01
JSON input
Paste a JSON object or array to infer field types.
Used as the generated interface or type name.
JSON is processed locally in your browser.
02
TypeScript output
Generate an interface or array type draft, ready to copy.
Review the generated result against your actual API data.
Tool guide
Paste JSON to draft interfaces/types. Nested objects become separate interfaces; array roots become type aliases. Complex generics and refined unions are out of scope.
- Good for quick drafts — review the result manually
- Invalid JSON shows a parse error
- Processing stays in your browser
FAQ
What about empty arrays?
Empty arrays become unknown[].
Is JSON uploaded?
No. Inference stays local.
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