ADVERT
🧩 JSON to TypeScript
Paste JSON and instantly generate TypeScript types for interfaces, models, and API responses. Runs fully in your browser.
JSON to TypeScript
Paste JSON and generate TypeScript types instantly. Ideal for API responses, mock data, and front-end models.
Click “Generate types” to create output.
How to use this tool
- Paste JSON into the input editor.
- Choose a root type name and optionally generate an interface.
- Generate, then copy or download the TypeScript output.
When to use this
- Turn API responses into typed models quickly.
- Create strict types for mock data and fixtures.
- Use in documentation or shared SDKs for consistent typing.
Type notes
- Mixed arrays become unions (e.g. (string | number)[]).
- Empty arrays default to any[] until you provide real data.
- Enable null conversion if you want optional fields instead of null unions.
FAQ
- Is my JSON uploaded anywhere?
- No. Parsing and type generation are done entirely in your browser.
- Why do I see any[] for arrays?
- Empty arrays provide no sample values. Add a sample item to infer types.
- Does it support nested objects?
- Yes. The generator recursively converts nested objects into inline TypeScript types.
ADVERT
ADVERT