Major online Bible sites have been hacked.
James Bible online: https://www.kingjamesbibleonline.org has been hacked but the .me version still works: https://www.kingjamesbible.me
Biblehub: https://biblehub.com has been hacked
Are there any other 'free' online sources that are really good and easily navigable?
I also have a large print edition that belonged to my mother.
You can also get the entire KJV Bible in text files from Project Gutenberg. You can pull them up in Notepad on your computer and make the text as large as you wish. I have a 43" monitor for my desktop computer, so I can make anything super large and easy to read. I could never read much on a phone, and even my Kindle Fire is a bit small for reading sometimes.