I’ve been investigating SlideShare, the online presentation-sharing website. It has some neat new features, including the ability to do a “private share” with a select group of contacts. For businesses this is a real plus.
However, I’m seeing some problems with photos embedded in my PowerPoint presentation. High-quality 300 DPI JPEGs are showing up very grainy and pixelated, almost as if the conversion routine that SlideShare uses isn’t properly converting the image files, or downconverting them, or something. Photo-quality images on my desktop are almost unusable online, even (especially?) at Full Screen resolution.
A SlideShare rep writes on their forums:
I also tried uploading as ppt, the image quality is much worse. I think our conversion algorithms are doing something not quite right there and I will our engineers to look into it. In the meantime, pdf is your friend.
In other words, don’t use PowerPoint files on SlideShare; convert your presentation to PDF first.