About Us

JSONts is a free online tool that converts JSON into TypeScript interfaces and type aliases. We built it for developers who are tired of hand-writing types for API responses, config files and fixtures — paste the JSON, take the types, move on with your day.

Our Approach

We believe developer tools should be fast, honest and private. That is why the entire conversion engine runs in your browser:

• No uploads. Your JSON is processed locally with JavaScript and never sent to any server.
• No sign-up. No accounts, no email walls, no watermarks.
• Smart output. Nested objects become named interfaces, identical structures are de-duplicated, and mixed arrays become precise unions with optional fields.

The Name

"JSONts" reads as JSON to TS — and the site is designed like an old type-setter's press, because that is exactly what it does: it takes a rough manuscript (your JSON) and returns cleanly composed movable type (your TypeScript definitions).

Get in Touch

Found a bug, or have an idea for a feature that would make your workflow faster? We would love to hear from you — visit our contact page and drop us a line.