Reformat minified or sloppy JavaScript into clean, evenly indented code that's easy to read, entirely in the browser. Paste it in, format, and copy — your source is never uploaded or run.
JavaScript Formatter is a quick, no-nonsense developer utility that runs entirely client-side, so your code and data never leave your machine.
No. Your code is treated as text and only reformatted — never executed.
Yes, that is a common use case.
No — formatting is local to your browser.