Paste minified or tangled HTML and this reindents it into clean, readable markup, normalizing the nesting and spacing so a template or snippet is easy to scan. Your code is formatted in the browser and never sent anywhere.
HTML Formatter is a quick, no-nonsense developer utility that runs entirely client-side, so your code and data never leave your machine.
It only reformats whitespace and indentation; content and structure are preserved.
Yes — that is a common use case.
No — formatting happens in your browser.