How to open a .key file on Windows or Android
Someone sent you a .key presentation, and you are on Windows or Android. It is a Keynote file — Apple’s app, which does not exist on other systems, and PowerPoint cannot open it. You can still see it.
What a .key file is
Keynote is Apple’s free presentation app for Mac, iPhone and iPad, the counterpart of PowerPoint. It saves files in a closed format that only Apple’s apps read in full. That is why double-clicking a .key on Windows or Android does nothing.
1. Keynote on iCloud
Apple has a web version of Keynote at icloud.com. It runs in a browser on Windows, shows every slide and can save the presentation as PowerPoint. You need an Apple ID — free to create without an Apple device — and the file is uploaded to your iCloud Drive first.
2. Ask for PowerPoint or PDF
The most reliable way is to ask the sender to save the presentation again. In Keynote on a Mac it is File → Export To → PowerPoint or PDF; on iPhone and iPad export is in the Share menu. PowerPoint opens anywhere, and PDF keeps the layout exactly.
3. Take a quick look in OsonKit
If you just need to know what the presentation is, drop the file on OsonKit. Keynote saves a picture of the first slide in every .key file — OsonKit shows it and tells you how many slides there are. The file is read in your browser, on a computer or a phone, and sent nowhere.
- Only the first slide is visible: the rest are stored in Apple’s closed format.
- Files up to 50 MB.
- When the export arrives, PowerPoint and PDF open here in full.
Which way to choose
Need every slide right now and fine with uploading the file to the cloud — use iCloud. The presentation is confidential — ask for a PDF or PowerPoint and open it in your browser with no upload. And to check in a second whether it is the right file, the first-slide preview is enough.