Can we use the .PPTX file extension?

I am in need of an Office Suite and do not have the money for MSO. Does LibreOffice 4.1 support the use of .PPTX? I am doing my Graduation Project and need an alternative.

Thanks!

Yes. LO supports reading and writing to MicroSoft Office Open XML (OOXML) file formats. The support is however not perfect and it is possible you may experience problems depending on what is required in terms of layout, formats, effects, embedded content, etc.

Before presenting live I suggest to open document on the same version of Microsoft PowerPoint that will be presented. To see if everything is presented OK. My experience is to have little trouble like font size and layout.

If you have an option to present from your e.g. laptop then I would suggest to save file in ODF because this is default LibreOffice format.

One maybe not the most elegant option is to convert presentation to PDF file, but in this case if you would like to have some fancy changing slides then this option is not the one you are looking for.

The answers of @oweng and @L-user are very good. Let me add 2 comments.
I am currently using LibO 4.1.4.2 on Windows XP/SP3

1 - Consider also to create a ppt-version. If MS format is needed I prefer ppt
2 - I recently needed to prepare a back up version for a Windows PC with requested format pptx or ppt. I decided to copy a portable version of LibO and a copy of my odp-presentation to an USB stick. Thus if there would have been a problem with my PC, I use the USB stick and present via the LibO portable version. Portable version 4.1.4.2 is already available. Maybe this is an alternative for you.

Good luck for your graduation project!

This is good idea… So saving LibreOffice Portable on USB stick. Saving a presentation document on USB stick. When presentation is required then run LibreOffice Portable from USB stick and the presentation is going to look exactly the same as on your computer. Excellent idea. +1 vote.

This is good idea… So saving LibreOffice Portable on USB stick. Saving a presentation document on USB stick. When presentation is required then run LibreOffice Portable from USB stick and the presentation is going to look exactly the same as on your computer. Excellent idea. +1 vote.