Install unrtf by entering the following commands in the terminal:
sudo apt update sudo apt install unrtf
Description:
RTF to other formats converter
UnRTF is a moderately complicated converter from RTF to other formats, including HTML, LaTeX, and text. Converting to HTML, it supports tables, fonts, colors, embedded images, hyperlinks, paragraph alignment among other things. All other conversions are "alpha"--just begun.
Homepage: http://www.gnu.org/software/unrtf/
Version: 0.21.9-clean-3
Section: universe/text