Developer Utilities
JSON to TypeScript Interface Generator
Generates clean TypeScript interfaces and type definitions from JSON data. Processed client-side.
How to use JSON to TypeScript
- Paste any JSON object or array.
- Click Generate.
- Copy clean TypeScript interface definitions.
A practical example
{"user":{"id":1,"name":"Alex"}} generates interface User { id: number; name: string; }.
What to check before using the result
Infers types based solely on the provided JSON sample values.
Local processing
Inputs are processed in this tab. The site and some engines still load network assets.
Inspect before sharing
Review the output and keep the original file. Large files may take longer to process.
No account needed
No account, API keys, or watermarks required.