Sorry for the naming confusion. This tool does not deal with MS Excel files which are binary files and needs specialized programs (like MS Office/libre office)

Sorry for the naming confusion. This tool does not deal with MS Excel files which are binary files and needs specialized programs (like MS Office/libre office) to make sense out of it. This tool just reads plain text CSV/TSV Files. Also this is just a browser based tool reading the plain text CSV/TSV files and there is no server side program processing it.