Convert files
Images, spreadsheets and text, changed from one format to another. It all happens in this browser, so nothing is uploaded.
Files are read and rewritten by this browser. They are never sent anywhere, which is why this works with no account and why it stops if you close the tab. PDFs can be made here but not taken apart, and audio and video are not here at all: both need a large extra download, which is not something to add quietly.