- twitter-extension - Adds support of Twitter usernames and hastags
- prettify-extension - Adds Google Prettify hints to HTML output
- showdown-icon - Adds support of Glyphicon and font-awesome into Markdown
- showdown-xss-filter - Filters XSS, using leizongmin/js-xss
- showdown-toc - Adds Table of Contents
- showdown-footnotes - Adds simple footnotes
- katex-latex - Displays math using KaTeX and LaTeX or AsciiMath
!!! note "" If you have a Showdown extension you would like to add here, you can raise an issue.