How do you view rendered markdown file without public sharing link?

I notice that when I create a new text file and save it with a .md file extension, the markdown text is rendered properly in HTML when I view the file using a public shared link. However, the only way to view it when it is not shared publicly-by-link is by opening the file and seeing the raw text in the text editor popup. Am I missing something? Is there a way to see the rendered markdown without sharing a public link?