reference/pandocref.txt

# .txt to .html
pandoc -o output.html input.txt
pandoc -s -o output.html input.txt

# .html to Markdown
pandoc -f html -t markdown file.html

# Markdown to .html
pandoc -o file.html file.md

# RMarkdown to .html
pandoc -o file.html file.Rmd

# markdown to latex
pandoc -o output.tex input.txt

# .txt to .pdf  (production of a PDF requires that a LaTeX engine be installed)
pandoc input.txt -o output.pdf

--verbose 
--version                # print version
--help                   # show usage message
--preserve-tabs          # preserve tabs instead of converting them to spaces (the default)
--tab-stop=NUMBER        # specify the number of spaces per tab (default is 4)
--extract-media=DIR      # 
--dpi=NUMBER             # specify the dpi (dots per inch) (default is 96dpi)
--no-highlight           # disables syntax highlighting for code bloks and inlines
--hightlight-style=STYLE # specifies the coloring style to be used in source code
--html-q-tags            # use <q> tags for quotes in HTML
--ascii                  # use only ascii characters in output (only for HTML output)
--reference-links        # use reference-style links, rather than inline links

# To get a complete list of supported programming languages, you can run the command
pandoc --list-highlight-languages