>>letien+(OP)
I’d highly recommend pandoc[0] if you need markdown conversion. Basically converts from everything and any markdown style to everything else. And then for clipboard just use `| pbcopy` on a Mac or `| xsel -ib`. Full command on a Mac would just be `pandoc README.md -t html | pbcopy`. If you want a docx you can get that too.
>>roxolo+aG
Bonus, xclip can be directed provide the rich text directly to the clipboard (op this might offer you a solution that is usable as text by your recipients):