What is a .KEY-TEF File And How To Open It – Apple

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While downloading files, you might have downloaded a file with the .key-tef extension. It is possible that you know what the file does, but you are unsure on how to open it. Don’t worry! This article explains everything about the .key-tef file extension, how to open and work with it on various systems.

What is a .KEY-TEF file?

The .KEY-TEF file extension is from Keynote iCloud Presentation. This file extension was developed by Apple. This data related file is in binary format.

What to know

There is currently 1 software that can open the .key-tef file on 2 platforms.

How to open a .KEY-TEF file?

Below we have written a comprehensive guide on how to open the .KEY-TEF file on various operating systems.

How to open a .KEY-TEF file on Mac

Below you can see a visual guide on how to open the .key-tef file on Mac in 4 easy steps.

1. The first step is to download the Apple Keynote software. This software will be used for opening the file.

Step 2

Step 2: Finding your .KEY-TEF file

2. The second step is locating the downloaded file. The file can be usually found in your /download/ folder if you don’t remember where you have downloaded it to.

Step 3

Step 3: Clicking “Open with”

3. In the third step, after locating your file, right click on it and click “Open with”.

Step 4

Step 4: Choosing the software to open your file

4. After choosing the “Open with” option, you will have an option to choose the Apple Keynote software you have downloaded. Click on the software and click “OK”. That’s all, now you have opened your file on Mac.

How to open a .KEY-TEF file on iOS

We have written below an easy-to-understand guide on how to open the .key-tef file on iOS in few easy steps.

Step 1

Image 1: Finding your files in the download folder

First of all you need to locate the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 2

Image2: Can’t open the file

To open the file, you will need to download the Apple Keynote software. Please search for it in the iOS App Store and install it. You could also download the Apple Keynote software. Congratulations! You can now open your file on iOS.

Still cannot open the .KEY-TEF file?

If you are still unable to open the .KEY-TEF file, it might be because you are trying to open the wrong one. There are many similar file extensions that look like the .KEY-TEF file.kf2 – Rockstar Games, .kfl – Microsoft, .kfm – Gamebase, .kfn – Recisio, .kfs – Rockstar Games. You might be trying to open one of them. Please recheck the file extension again.


In this article you have learned how to open the .KEY-TEF file with the Apple Keynote program on Mac and Apple Keynote software on iOS.