Paste text onto the typewriter's sheet and press keys: strip accents, make slugs, UPPERCASE, lowercase, Title Case, Sentence case, old (hòa, thủy) or new (hoà, thuỷ) tone placement, collapse spaces, join lines broken by a PDF copy, sort lines in Vietnamese order, drop repeated lines. Select a passage and the keys only change that part.
Text from old documents in broken fonts (“ViÖt Nam”, “Vieät Nam”) is recognised and converted to Unicode in one press. Words, characters, sentences and SMS count update as you type; your text never leaves your device.