JSON to TypeScript
Interfaces straight from a payload
Paste a JSON payload and instantly get clean TypeScript interfaces — nested objects become named types, array items merge, and fields missing from some items are marked optional.
How it works
- Open the tool and add your file (or paste your text).
- Adjust the options — everything previews instantly.
- Download the result. Done.
Private by design
JSON to TypeScript runs 100% in your browser. Your files are never uploaded to a server, never stored, and never seen by anyone — close the tab and nothing remains.
Free, no limits
JSON to TypeScript has no account, no watermarks and no daily caps. If you also need full design tools, the Ijodly editor is one click away.
Frequently asked questions
Is JSON to TypeScript free to use?
Yes — JSON to TypeScript is completely free. There is no account to create, no watermark on your results and no daily limits.
Are my files uploaded when I use JSON to TypeScript?
No. JSON to TypeScript runs entirely in your browser. Your files never leave your device and nothing is stored on a server — close the tab and nothing remains.
Do I need to install anything or sign up?
Neither. Open the page, use JSON to TypeScript straight away and download your result. No install, no signup.