JSON to TypeScript Converter
Convert JSON objects and arrays into TypeScript interfaces and type declarations directly in your browser.
About this tool
What is JSON to TypeScript Converter?
Generate TypeScript definitions from JSON without installing a package or sending data to an external conversion service. Paste valid JSON, choose a root type name, and Avorqin infers strings, numbers, booleans, null values, arrays, nested objects, and union-style array element types.
How to use
Get your result in a few steps
- 1
Paste valid JSON into the editor.
- 2
Enter a root type name or keep the default.
- 3
Click 'Generate TypeScript'.
- 4
Review and copy the generated interfaces and type declarations.
Frequently asked questions
Questions about JSON to TypeScript Converter
What TypeScript types can the converter infer?
It infers common JSON values including strings, numbers, booleans, null, arrays, and nested objects.
What happens when an array contains different value types?
The converter combines the detected element types into a TypeScript union where needed.
Does it generate optional properties?
No. The generated interfaces describe the properties present in the JSON sample you provide and do not automatically infer optional fields from missing examples.
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