You may want to share your PowerPoint files with others, but not worry about whether they have a compatible version of PowerPoint. Instead, convert the file to Adobe Acrobat PDF. Just about everyone's computer comes with the free Adobe Acrobat Reader.
Converting your PowerPoint file into Adobe Acrobat .pdf format allows you to share your presentation or PowerPoint file with others without giving them the capability to copy and edit your presentation. It also makes it easier to share your PowerPoint file as a download file on your web site. Maybe you gave a training presentation and you want to share the file with attendees. Almost everyone has the free Adobe Acrobat Reader installed on their computers, so you don't have to worry about explaining how to open a file.
You don't need to buy the expensive Adobe Acrobat Professional to convert your .pptx (PowerPoint 2007 format) and .ppt (PowerPoint 2003 and earlier format) files to .pdf. These are the free applications.
Free PPT to PDF Downloadable Software
These free applications allow you to download software to convert PPT to PDF without relying on an Internet connection or any limitations that come with web-based applications.
novaPDF: Software that converts your PowerPoint presentation into a PDF file by clicking the Print button.
PrimoPDF: Software application you download and install on your PC to convert PowerPoint, Word and Excel files to PDF.
RonyaSoft: Download software to convert files to PDF using the "PDF printer" from your printer options. The tool can convert PPT, DOC and JPG files into PDF.
Free PPT to PDF Online Conversion
You can convert your PowerPoint file to PDF without installing anything. However, the service might have size limitations.
Kinati 2PDF: Online web-based conversion service that turns various file formats into PDF files. The service accepts files up to 15MB in size.
Media Convert: Convert PowerPoint files to Acrobat online through Web-based application. The service will send an email notification when conversion is done and it can handle files up to 200mb in size.
PDF converter: Online web-based application that converts PPT and other Office files to PDF. All files are deleted after you download them or within 24 hours, whichever comes first. Service converts only first two pages. To have more, need to become a paid member.
Use caution when downloading software from the web and be sure you're running an antivirus and antispyware as we can't guarantee these applications are free of spyware and viruses.