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ProgrammerKit

JSON to TypeScript Interface

Generate TypeScript interfaces from any JSON sample.

Free · Runs in your browser · Last updated

About this tool

Paste a JSON object and instantly get strongly-typed TypeScript interfaces, with arrays and nested objects properly typed.

Privacy

All processing for JSON → TS happens locally inside your browser using JavaScript. Your input is never uploaded to a server, logged, or shared with third parties.

Frequently asked questions

Is the JSON → TS free to use?

Yes. JSON → TS is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.

Is my data safe when I use JSON → TS?

All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.

Does JSON → TS work offline?

Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.

Which browsers are supported?

JSON → TS works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.

Do I need to install anything?

No. JSON → TS runs in any modern web browser with no installation, browser extension, or account required.

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