Try pandoc!

https://pandoc.org

Convert   from CommonMark Creole DocBook GitHub-Flavored Markdown Haddock markup HTML LaTeX Roff man Markdown (pandoc) MultiMarkdown Markdown (PHP Markdown Extra) Markdown (strict) MediaWiki Muse Native (Pandoc AST) OPML Org Mode reStructuredText Txt2Tags Textile TikiWiki TWiki Vimwiki

to S5 AsciiDoc LaTeX Beamer CommonMark ConTeXt DocBook v4 DocBook v5 DokuWiki DZSlides dzslides GitHub-Flavored Markdown Haddock markup HTML 4 HTML 5 ICML JSON LaTeX Roff man Roff ms Markdown (pandoc) MultiMarkdown Markdown (PHP Markdown Extra) Markdown (strict) MediaWiki Muse Native (Pandoc AST) OpenDocument OPML Org Mode Plain text reveal.js reStructuredText RTF Slideous Slidy Texinfo Textile ZimWiki