Case Converter

How this works

Converted in this tab. A small script in your browser does the work. There is no server code that could receive your text.
Nothing can be sent. The page's security policy forbids it from opening any connection once it has loaded, and from running code from anywhere else.
Nothing is kept. Your text is never saved in the browser, put in the address bar, or written to a log, and both boxes empty when you leave the page.
Check it yourself. Watch the Network tab in your browser's developer tools while you convert, or switch your connection off: the page keeps working.

What no page can promise: software you run beside it, such as a browser extension, a clipboard manager, or a work computer's monitoring, can still see what you type.