Lightmd for Chrome
More About Lightmd
lightmd does not rely on a backend. It does not send the content to any external server.
lightmd is designed to be lightweight, not feature rich, while still providing some flexibility as a scratchpad.
Preview supports three styles, None (browser default rendering), Github (inspired), and a custom lightmd style (seen in screenshot).
lightmd allows for export to .md, HTML, and printing directly from the preview frame (must hit the Print button, not Ctrl+P).
The extension stores your content while you type in the browsers local storage. It has 4 "slots" which can be swapped between as you wish.
NB! Wiping browser local storage will wipe the contents stored in these editors!
lightmd is open source and available on GitHub: https://github.com/jorgenys/lightmd