Files are read and processed on this page only. Their names, values and structure are never uploaded, stored or sent anywhere.

The only network request this page makes is to a URL you type in, and only when you click Load.

Check it yourself

Open your browser's developer tools, go to the Network tab, and load a file. Nothing is sent. You can also turn off Wi-Fi after the page loads; everything keeps working.

Full isolation

Clone the repository and run the strict build (npm run build:strict), which works offline from a local file.