From jbt.github.io - November 11, 2017 9:38 AM
(GitHub-Flavored) Markdown Editor

Basic useful feature list:

  • Ctrl+S / Cmd+S to save the file
  • Ctrl+Shift+S / Cmd+Shift+S to choose to save as Markdown or HTML
  • Drag and drop a file into here to load it
  • File contents are saved in the URL so you can share files