Allows you to compose content in Markdown on a per-item basis. The markdown version is stored separately, so you can deactivate this plugin any time.
markdown-on-save folder to your
Activate the "Markdown On Save" plugin in your WordPress administration interface
Create a new post with Markdown, and check the "This post is formatted with Markdown" box.
Done! Now that post can be edited using Markdown, but will save as processed HTML on the backend.