There will be a preview of the generated HTML in the Preview tab. You can then simply copy the HTML onto the clipboard with the "Copy HTML" button or look at the HTML on the "HTML Code" tab.
Feel free to use as much as you need to copy the HTML into your own pages.
The “Copy HTML” button should work with all modern browsers. If does NOT work, or there is no button, then you will need to select the text and copy by hand.
The “Copy & Clear ” button will copy the HTML into the clipboard and then clear the markdown entry box, making it easy to paste in new markdown text.