https://techcommunity.microsoft.com/discussions/sharepoint_general/sharepoint-online-text-editor-ribbon-items-disappear-and-file-editor-will-not-sa/667238/replies/2193558
SharePoint Online Text Editor Ribbon Items Disappear and File Editor will not save changes |...
The text editor for editing files no longer has the top ribbon which allows for saving and updating files. It no longer appears after "Open In Text Editor"...
online text editorsharepointribbonitemsdisappear
https://www.onlinenotepad.io/
Online Notepad - Free Online Text Editor for Notes
Online Notepad is a free text editor and WordPad alternative for writing, saving, downloading, and sharing notes and text files. No sign-up required.
online notepadtext editorfreenotes