I am looking for a free, usable without registration, online web text editor that...
- supports a vertical split pane. I want be able to write different text on both vertical panes and thus being able to compare them visually.
- plain ASCII support is sufficient. No extra bells and whistles needed/wanted.
- no special features for search/replace required (Ctrl+F from the browser is fine)
As a bonus but not necessary:
- Markdown formatting support
- Visual highlighting of text differences (diff tool) such as provided by for instance Meld
Do you know of any web application that offers that?