File extension for Markdown files?

There is no requirement for a Markdown file extension. However to ensure editors or parsers recognise a file is Markdown-formatted, one of the following extensions would be checked for: There are websites such as GitHub that use subset of these extensions when converting to HTML so developers will conform to their standard. Examples of extension usage: GitHub: .markdown, .mdown, .mkdn, .mkd, .mdwn, .md (source) Vim markdown: .markdown, .mdown, .mkdn, .mdwn, .mkd, .md (vim-m-src) Bitbucket: .md,…