JSON to TypeScript
Infers TypeScript interfaces from a JSON object, automatically generating nested interfaces for embedded objects and arrays.
JSON
TypeScript
JSON to TypeScript — Free Online Tool
Infers TypeScript interfaces from a JSON object, automatically generating nested interfaces for embedded objects and arrays.
How to use the JSON to TypeScript
- Open the tool above — it runs entirely in your browser, so your input never leaves this page.
- Paste or type your input into the field, then press the relevant button (e.g. Encode / Decode, Generate, or Convert).
- Copy the result from the output area with the copy button orCtrl/Cmd + C.
- No signup, no upload, and no tracking — repeat as often as you need.
Frequently asked questions
Is the JSON to TypeScript free to use?
Yes. The JSON to TypeScript is completely free, with no signup, no ads inside the tool, and no hidden limits.
Does the JSON to TypeScript upload my data?
No. The JSON to TypeScript processes everything locally in your browser. Your input is never sent to a server, so it stays private even on shared devices.
Does the JSON to TypeScript work offline?
After the page loads, the JSON to TypeScript runs entirely in your browser, so it keeps working without a network connection.
Free & private — why use this JSON to TypeScript
The JSON to TypeScript runs 100% client-side in your browser. Your data is never uploaded to a server, no account is required, and the tool is completely free. It works offline once the page has loaded and is part of a growing collection of privacy-first developer utilities.