I don’t use these kinds of tools in private unless I have to, and when I do, I found that OnlyOffice has better compatability with .docx-files. I recently had to make some changes and format a .docx-file, and after struggling to make it look correct in LibreOffice*, it did not show up correctly in Word. Output was more or less the same in OnlyOffice as in Word, and after redoing it in OnlyOffice, it looked almost completely correct in Word.

• This is, however, always a problem with these kinds of programs in my opinion.