Now you can convert your MS Office File like docx, pptx and xlsx online in Gmail. No this was not a trick this was the new Feature in Gmail from there you can convert your Files into HTML easily. Check the Screenshot Below for Info:
See Also: 7 easy ways to Open docx Files
See Also: Convert Word & excels File to HTML
See Also: Convert Microsoft Office Docx file to HTML
I read a similar article written by Amit from Labnol.