LuaLaTex + MakeIndex + BibTex to html or docx file

Question

Is there any way to convert my (LuaLaTex + MakeIndex + BibTex) main.tex from MikTex file to html or docx?

I've tried this https://tex.stackexchange.com/a/73092/189401 but it's not what I want.

These are the packages I'm importing in the preamble:

\documentclass[12pt, a4paper]{article}

\usepackage{fontspec}

\setmainfont{Times New Roman}

\usepackage{setspace}

\setlength{\topmargin}{-2.5cm}

\usepackage[top=2.50cm, bottom=2.50cm, left=3.00cm, right=2.00cm]{geometry}

\setcounter{tocdepth}{4}

\setcounter{secnumdepth}{4}

\usepackage{fancyhdr}

\fancypagestyle{plain}{
\fancyhf{}
\fancyfoot[R]{\thepage}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}}

\pagestyle{fancy}

\fancyhf{} 

\rfoot{\thepage} 

\renewcommand{\headrulewidth}{0pt} 

\usepackage[LGR, T1]{fontenc}

\usepackage[utf8]{inputenc}

\usepackage[english,greek]{babel} 

\usepackage[unicode, linktoc=all]{hyperref} 

\usepackage{mwe}

\usepackage{graphicx} 

\graphicspath{{images/}} 

\usepackage{easyfig}

\usepackage{float}

\usepackage{cleveref}

\crefname{figure}{figure}{figures}

\Crefname{figure}{Figure}{Figures} 

\hypersetup{colorlinks=true, linkcolor=black, urlcolor=black, citecolor=black}

\usepackage[bibencoding=auto,backend=bibtex,autolang=other,sorting=none]{biblatex}

\renewcommand\bibliographystyle{unsrtnat}

\usepackage{csquotes} 

\addbibresource{bib.bib} 

\usepackage{multirow}

\usepackage{tabularx}

\usepackage{tabulary}

\usepackage[12pt]{moresize} 

\usepackage{abstract} 

\renewcommand{\abstractnamefont}{\normalfont\large}

\renewcommand{\abstracttextfont}{\normalfont\normalsize}


\usepackage[toc,page]{appendix}

\usepackage{xcolor} 

\usepackage{import} 

\begin{document}

Answer 1

OK, I've added some sample code to your example and tried it with make4ht. It compiles mostly OK, I've just had to remove few unnecessary packages (don't use fontenc and inputenc together with fontspec, also, don't use BibTeX commands with BibLaTeX)

Here is the modified example:

\documentclass[12pt, a4paper]{article}

\usepackage{fontspec}

% \setmainfont{Times New Roman}

\usepackage{setspace}

\setlength{\topmargin}{-2.5cm}

\usepackage[top=2.50cm, bottom=2.50cm, left=3.00cm, right=2.00cm]{geometry}

\setcounter{tocdepth}{4}

\setcounter{secnumdepth}{4}

\usepackage{fancyhdr}

\fancypagestyle{plain}{
\fancyhf{}
\fancyfoot[R]{\thepage}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}}

\pagestyle{fancy}

\fancyhf{} 

\rfoot{\thepage} 

\renewcommand{\headrulewidth}{0pt} 

% \usepackage[LGR, T1]{fontenc}

% \usepackage[utf8]{inputenc}

\usepackage[greek,english]{babel} 

\usepackage[unicode, linktoc=all]{hyperref} 

\usepackage{mwe}

\usepackage{graphicx} 

\graphicspath{{images/}} 

\usepackage{easyfig}

\usepackage{float}

\usepackage{cleveref}

\crefname{figure}{figure}{figures}

\Crefname{figure}{Figure}{Figures} 

\hypersetup{colorlinks=true, linkcolor=black, urlcolor=black, citecolor=black}

\usepackage[bibencoding=auto,backend=biber,autolang=other,sorting=none]{biblatex}

% \renewcommand\bibliographystyle{unsrtnat}

\usepackage{csquotes} 

\addbibresource{biblatex-examples.bib} 

\usepackage{multirow}

\usepackage{tabularx}

\usepackage{tabulary}

\usepackage[12pt]{moresize} 

\usepackage{abstract} 

\renewcommand{\abstractnamefont}{\normalfont\large}

\renewcommand{\abstracttextfont}{\normalfont\normalsize}


\usepackage[toc,page]{appendix}

\usepackage{xcolor} 

\usepackage{import} 
\usepackage{makeidx}
\makeindex

\begin{document}
Hello world. Some indexing.
\index{hello}
\index{hello!Peter}
\index{Jenny|textbf}

Some citation \cite{gillies}

\printbibliography
\printindex
\end{document}

The index and bibliography creation can be automated using make4ht build file. It needs the development version of make4ht for the correct index. Save the following code as mybuild.lua:

if mode=="draft" then
Make:htlatex {}
else
Make:htlatex {}
Make:xindy {}
Make:biber {}
Make:htlatex {}
end

The document can be compiled using command

make4ht -ule build.lua filename.tex

The subsequent compilations, when the bibliography and index hadn't changed, can be speed up using

make4ht -ule build.lua -m draft filename.tex

It will execute LaTeX only once, it will not execute Xindy nor Biber.

Here is the result:

Answer 2

Try pandoc - https://pandoc.org/

The command line should be something like this:

pandoc -s --toc my.tex -o my.html