Slideshare does support all fonts – including custom fonts that you download.
I was told that the slides only support certain standard fonts, but I wasn’t satisfied with the answer, and so I created a slide to verify. The result is:
How mac fonts appear in slideshare?
View more presentations from Junda Ong
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As you can see, all fonts are shown!
If you have time, take a look and comment on teh presentation I’m currently working on.