About this invisible text generator
Apps reject a name or message made of normal spaces, but accept characters that only look blank. This page gives four, because support differs: the Hangul filler (U+3164) works for blank names in many games, the Braille blank (U+2800) has the widest support in chats and bios, the zero-width space takes no room at all, and the em space adds width that is not collapsed.