Free?
Sort of, if you don't mind being the "product" as part of the free data slurping that will happen..
Per link above..
"All you need is a Microsoft account and a data connection. Head to โthe official Office website in your browser of choice, enter your login credentials and choose โMicrosoft Wordโ. Office Online offers more than just Microsoft Word, too, with Excel, Powerpoint, and much more also available for free.
Using Microsoft Word online is a lot like Google Docs, in that you have automatic cloud backups of your work with OneDrive. You also have the ability to collaborate with other people in real-time. This isnโt the full version of Microsoft Word, but it looks the same and has all the basic suite of features that the majority of people will need access to."There may be other silly limitations like making saving a document to your own device a real pain.
If you want full featured Office with zero limitations this is not one of those things.
Can't find 2019 online version limitations but as of 2017 there was way to many limitations to MS word that reduced it to functionality between Notepad and Wordpad and those Web versions required your documents to be online only in order to edit them.. My DD has used it but those limitations can be extremely frustrating at times.
HEREis a list of known limitations from 2017..
I would suggest trying to research exactly what limitations exist before putting all the eggs in the web browser free version..
You can also use older versions of MS Office even on Win10, I have Office 2000 with compatibility pack (allows open and save in newer "docx" format) installed and running perfectly fine on Win10.. If you have a legit copy of newer versions you can install them on Win10.