Keynote Reader For Mac

I only have the .key presentation file and cannot ask the author to export it to ppt nor do I have an Apple computer available.
With its powerful tools and dazzling effects, Keynote makes it easy to create stunning and memorable presentations. You can even use Apple Pencil on your iPad to create diagrams or illustrations that bring your slides to life. Buy, download and read My Pages, Numbers, and Keynote (for Mac and iOS) ebook online in EPUB or PDF format for iPhone, iPad, Android, Computer and Mobile readers. Author: Brad Miser.

Apple Keynote For Mac
4 Answers
There is now a keynote viewer for the browser using icloud. If you have a Apple device, you can make an icloud account, and upload the file to your account. then go to icloud's website and play it on any browser.
The following websites can convert the .key to PDF online:
- https://cloudconvert.com/key-to-pdf (tested on 2019-02-01)
- http://www.zamzar.com (tested on 2013-08-15)
Also, the .key is a zip archive: if you unzip you may be able to see a thumbnail for each slide.
Franck DernoncourtFranck DernoncourtApple Keynote Download For Windows
Since it is a proprietary format, you will need to use KeyNote to open it.
You obviously can't export the file as anything since you would need to open it first in order to export it ;-)
I know that Keynote files can be 'played' in QuickTime on a Mac, but I don't know how feasible that is in Windows. Worth a try.
Keynote Reader For Windows

Creating an apple account is free and Key note is also free to use with that on ICloud. So we just needed to go to https://www.icloud.com create a user, log in with that and we have the abilities online on the browser