One of the open source wysiwyg editors I have been trying to use is BlueGriffon. It does what you want. But it hasn't been updated for a while. I remember codei

One of the open source wysiwyg editors I have been trying to use is BlueGriffon. It does what you want. But it hasn't been updated for a while. I remember codeigniter soe something like that used to do that back in 2010s.