In the Convert result screen you will find all the XLSX files that you uploaded. How to convert XLSX to DOCX? — Converter.i.e. The best open source XLSX to DOCX and OpenOffice converter is this application — it supports more than 25 different file formats and allows you to work with more than 4,000 Excel workbooks. Just select the file, upload or upload a new Microsoft Word file and use it to convert to DOCX. XLSX to DOCX — Convert OpenOffice.org XLSX to DOCX — Excel Online Converter 1. Create a document on the website before going to this site, click on create a document. 2. Click on the file drop-down, select the desired file, and click the Convert button. 3. The converted documents will be posted in the results list.