Killer Tech Tips

Software, Websites, Hacks You can Use

Convert XLSX to XLS

with 61 comments

You got an XLSX file that was created using Microsoft Office 2007 but unfortunately you cannot open it because you have an older version of Microsoft Office installed on your computer that can only handle XLS files and not XLSX files.

So, how do you convert XLSX to XLS so that you can open the XLS spreadsheet file and edit it in older versions of MS Excel? Here’s a step-by-step guide on how you can go about converting XLSX to XLS:

Download the Microsoft Office Compatibility Pack for Excel 2007 from here (27 MB) and double click  FileFormatConverters.exe. Accept the license agreements and click Continue.

Microsoft XLSX to XLS Converter

The installation of the XLSX to XLS converter begins. A confirmation is displayed when the installation is complete.


Double click on the file that has to be converted from the XLSX to XLS format. Otherwise, right click, select ‘Open With’ and choose ‘Microsoft Open XML Converter’. Give a name for the XLS file and then click the Save button.


The XLSX to XLS conversion process begins, and the new XLS file is saved in the location you specified.

image XSLX Conversion

The XLSX to XLS conversion is complete.

Written by Killer Tech Tips

April 23rd, 2009 at 11:56 am

  • Amandeep Gulati

    You can easily convert .xlsx to .xls online by using

  • Bibi63

    Very good help – thank you

  • Sonaline2008


  • santde

    Cool. It works. Thanks a lot.

  • Ejpro

    Excellent converter program, saved many hours!

  • N N D

    Really works. Thanks!!!

  • Martin Garcia

    Thanks for this tip, it was really useful!

  • Dandlo

    Does it work on a PPC Mac G5?

  • Asadeque

    thanks a lot. Working nicely.

  • Mohnd Aaiz

     ??????? ?????? ? ??????? , ??????? ?????? ???????? … ????????? ??????? ? ????? ???????? …

  • Pingback: Anonymous